Book 1:
Your Local Weather
Cover Photo: ©ArtMarie/E+/Getty Images, Page 3: ©Jupiterimages/Stockbyte/Getty Images, Pages 4-5: ©Jupiterimages/Photos.com/Getty Images Plus, Pages 4, 15: ©Volodina/iStock/Getty Images Plus, Pages 4, 23, 34 (tl): ©Dejan Ristovski/iStock/Getty Images, Pages 6, 39 (cl): ©Nabi Lukic/iStock/Getty Images Plus, Page 7: ©Digital Vision./Photodisc/Getty Images, Pages 8, 38 (cr): ©miller3181/iStock/Getty Images Plus, Pages 9, 35 (tl): ©shalamov/iStock/Getty Images Plus, Page 10: ©sedmak/iStock/Getty Images Plus, Page 11: ©Stockbyte/Stockbyte/Getty Images, Pages 12, 36 (bl): ©xril/iStock/Getty Images, Pages 13, 39 (cr): ©juliaf/iStock/Getty Images Plus, Pages 14, 38 (bc): ©EduardSV/iStock/Getty Images Plus, Page 16: ©rogkov/iStock/Getty Images Plus, Page 17: ©Fuse/Getty Images, Page 18: ©Ingram Publishing/Getty Images, Page 21: ©Purestock/Getty Images, Pages 24, 35 (bl): ©TongRo Images/TongRo Images/Getty Images, Pages 25, 39 (bc): ©Purestock/Getty Images, Page 26: ©SeanXu/iStock/Getty Images Plus, Pages 27, 35 (tr): ©sokoziurke/iStock/Getty Images Plus, Pages 28, 37 (tr): ©Design Pics, Carl Shaneff/Getty Images, Pages 29, 38 (cl): ©Comstock/Stockbyte/Getty Images, Pages 30, 34 (br): ©vanessaweber/iStock/Getty Images Plus, Pages 31, 34 (lc): ©reniar/iStock/Getty Images, Page 32: ©Kivrin/iStock/Getty Images Plus.
Book 2:
Protecting Your Environment
Photo Credits: cover, tp, 35 (tl) © Jeffrey Hamilton/Photodisc/Thinkstock; Page 3: ©Ingram Publishing/Getty Images, Pages 4, 5: ©Ingram Publishing/Getty Images, Pages 4, 15: ©fotolinchen/iStock/Getty Images Plus, Pages 4, 25: ©BananaStock/Bananastock/Getty Images Plus, Pages 6, 34 (br): ©ArnonPolin/iStock/Getty Images Plus, Pages 7, 34 (tr): ©VanderWolf-Images/iStock/Getty Images Plus, Pages 8, 36: ©Thomas Northcut/Photodisc/Getty Images, Page 9: ©TPopova/iStock/Getty Images Plus, Page 10: ©monkeybusinessimages/iStock/Getty Images Plus, Page 11: ©Vstock LLC/Vstock/Getty Images Plus, Page 12: ©Chris Amaral/Digital Vision/Getty Images, Page 13: ©jamesdavidphoto/iStock/Getty Images Plus, Pages 14, 35 (bl): ©serggod/iStock/Getty Images Plus, Pages 16, 35 (tr): ©ceazars/iStock/Getty Images Plus, Pages 17, 38 (cl): ©Krasyuk/iStock/Getty Images Plus, Page 18: ©misha_ru/iStock/Getty Images Plus, Page 19: ©Jupiterimages/Creatas/Getty Images Plus, Page 20: ©Ryan McVay/Stockbyte/Getty Images, Pages 21, 38 (cl): ©Dmitry Naumov/iStock/Getty Images Plus, Page 22: ©Jupiterimages/Stockbyte/Getty Images, Page 23: ©alxpin/iStock/Getty Images Plus, Page 24: ©David Woolley/Digital Vision/Getty Images, Page 26: ©Mikhail Kondrashov/iStock/Getty Images, Page 27: ©Ryan McVay/Digital Vision/Getty Images, Pages 28 (c), 38 (bc): ©Chad Baker, Jason Reed, Ryan McVay/Photodisc/Getty Images, Page 28 (cr): ©Ryan McVay/Photodisc/Getty Images, Pages 29 (t), 39 (cl): ©Erdosain/iStock/Getty Images Plus, Page 29 ©: ©Jupiterimages/Creatas/Getty Images Plus, Pages 30, 34 (lc), 37 (br): ©Martin Poole/Digital Vision/Getty Images, Page 31 (tl): ©Jeffrey Hamilton/Photodisc/Getty Images, Pages 31 (cl), 39 (cr): ©Jitalia17/iStock/Getty Images Plus, Page 32 (tr): ©FotoMak/iStock/Getty Images, Pages 32 (c), 39 (br): ©seroz4/iStock/Getty Images Plus.
Photo Credits: cover, tp © Dezhi Wei/iStock/Thinkstock, Page 3: ©ktsimage/iStock/Getty Images Plus, Pages 4, 5: ©Fuse/Getty Images Plus, Pages 4, 11, 34©: ©Leandro Hernandez/iStock/Getty Images Plus, Pages 4, 15: ©dpenn/iStock/Getty Images Plus, Pages 4, 21, 35 (bl): ©vwalakte/iStock/Getty Images Plus, Page 6: ©Christian Heinrich/Getty Images, Pages 7, 36: ©imaginary_nl/iStock/Getty Images Plus, Pages 8, 38 (cr): ©sharpphotos/iStock/Getty Images Plus, Pages 9, 34 (tl): ©Ilya Postnikov/Hemera/Getty Images Plus, Pages 10, 34 (bl): ©Anup Shah/Digital Vision/Getty Images, Pages 12, 34 (cr): ©bridge3/iStock/Getty Images Plus, Page 13: ©wuviveka/iStock/Getty Images Plus, Page 14: ©Anup Shah/Digital Vision/Getty Images, Page 16: ©Lorenzo Rossi/Hemera/Getty Images, Pages 17, 35 (tl): ©ericsphotography/iStock/Getty Images Plus, Pages 18, 35 (tr): ©irakite/iStock/Getty Images Plus, Pages 19, 38 (b): ©Ivan Kuzmin/iStock/Getty Images, Pages 20, 38 (l): ©Monkey Business Images/Monkey Business/Getty Images Plus, Pages 22, 34 (tc): ©asiatravelphoto/iStock/Getty Images Plus, Pages 23, 34 (tl): ©kjorgen/iStock/Getty Images Plus, Page 24: ©Yuriy Kulik/iStock/Getty Images Plus, Page 25: ©JohnPitcher/iStock/Getty Images Plus, Pages 26, 39 (b): ©Woodkern/iStock/Getty Images Plus, Pages 27, 35 (br): ©Humpata/iStock/Getty Images Plus, Pages 28, 39 (tl): ©CraigRJD/iStock/Getty Images Plus, Pages 29, 39 (tr): ©connect11/iStock/Getty Images Plus, Pages 30, 35 (cl): ©Ingram Publishing/Getty Images Plus, Pages 31, 35 (cr): ©Mark_Doh/iStock/Getty Images Plus, Page 32: ©ShaneGross/iStock/Getty Images.
Photo Credits: Cover Page: ©mishooo/iStock/Getty Images Plus, Page 3: © Ariel Skelley/Blend Images/Getty Images, Pages 4, 5: ©KohanecLeonora/iStock/Getty Images Plus, Pages 4, 13, 39 (tl): ©Volokhatiuk/iStock/Getty Images Plus, Pages 4, 19: ©William Nilly/Photodisc/Getty Images Plus, Pages 4, 25: ©TongRo Images Inc/TongRo Images/Getty Images, Page 6: ©Fuse/Getty Images Plus, Page 7: ©George Doyle/Stockbyte/Getty Images, Pages 8, 36: ©mtilton/iStock/Getty Images Plus, Page 9: ©DigitumDei/iStock/Getty Images Plus, Page 10: ©MichaelUtech/iStock/Getty Images Plus, Pages 11, 35 (tr), 38 (cl): ©Purestock/Getty Images Plus, Pages 12, 34 (tl), 38 (cr): ©BryanToro/iStock/Getty Images Plus, Page 14: ©luamduan/iStock/Getty Images Plus, Page 15: ©chert61/iStock/Getty Images Plus, Page 16: ©szeyuen/iStock/Getty Images Plus, Pages 17, 35 (bl): ©xie2001/iStock/Getty Images Plus, Page 18: ©kovalvs/iStock/Getty Images Plus, Page 20: ©Clive27a/iStock/Getty Images Plus, Pages 21, 34 (br): ©rossario/iStock/Getty Images Plus, Pages 22, 39 (tr): ©JackF/iStock/Getty Images Plus, Pages 23, 37: ©prill/iStock/Getty Images Plus, Page 24: ©mack2happy/iStock/Getty Images Plus, Page 26: ©MacphersonPhoto/iStock/Getty Images Plus, Pages 27, 35 (tl), 39 (br): ©whisht/iStock/Getty Images Plus, Page 28: ©LesHoward/iStock/Getty Images Plus, Page 29: ©przemekklos/iStock/Getty Images Plus, Pages 30, 38 (bc): ©ideeone/iStock/Getty Images Plus, Pages 31, 34 (cl): ©Spanishalex/iStock/Getty Images Plus, Page 32: ©rvika/iStock/Getty Images Plus.
Photo Credits: cover, tp © Mark Atkins/iStock/Thinkstock, Page 3: ©solarseven/iStock/Getty Images Plus, Pages 4, 5: ©Comstock/Stockbyte/Getty Images, Pages 4, 13, 33 (lb): ©Image Source Pink/Image Source/Getty Images Plus, Pages 4, 25: ©fotek/iStock/Getty Images Plus, Pages 6, 38 (lc): ©Chad Baker/Photodisc/Getty Images Plus, Page 7: ©korionov/iStock/Getty Images Plus, Pages 8, 32 (br): ©Christopher Robbins/Digital Vision/Getty Images, Pages 9, 32 (lc): ©s_white/iStock/Getty Images Plus, Pages 10, 34: ©IakovKalinin/iStock/Getty Images Plus, Pages 11, 35, 39 (b): ©FreezeFrameStudio/E+/Getty Images, Page 12: ©vesilvio/iStock/Getty Images Plus, Page 14: ©David De Lossy/Photodisc/Getty Images, Pages 15, 33 (tl): ©kvv515kvv/iStock/Getty Images Plus, Pages 16, 38 (tr): ©Maria Teijeir/Photodisc/Getty Images, Pages 17, 38 (b): ©EyeMark/iStock/Getty Images Plus, Page 18: ©harryfn/iStock/Getty Images Plus, Pages 19, 36: ©Creatas Images/Creatas/Getty Images Plus, Pages 20, 33 (tr): ©thisisaghosttown/iStock/Getty Images Plus, Pages 21, 32 (tr): ©kvkirillov/iStock/Getty Images Plus, Page 22: ©OlafSpeier/iStock/Getty Images Plus, Pages 23, 37: ©hwahl/iStock/Getty Images Plus, Page 24: ©Purestock/Getty Images Plus, Page 26: ©Risto0/iStock/Getty Images Plus, Page 27: ©Digital Vision./Photodisc/Getty Images, Pages 28, 39 (lc): ©mandygodbehear/iStock/Getty Images Plus, Pages 29, 39 (tr): ©tepic/iStock/Getty Images Plus, Page 30: ©Bruskov/iStock/Getty Images Plus.
Photo Credits: cover, tp © Julie Bazinet/iStock/Thinkstock, 3, 35 © ZE'EV AVNI/iStock/Getty Images Plus, 4, 7, 34 (br) © Anton Foltin/iStock/Getty Images Plus, 4, 13 © sculpies/iStock/Getty Images Plus, 4, 20, 34, 38 (tl) © Jupiterimages/liquidlibrary/Getty Images Plus, 4, 28, 34 (bl) © Helen Shorey/Hemera/Getty Images Plus, 5, 34 (bc) © Don Stevenson/Hemera/Getty Images Plus, 6, 35 (lc) © GroblerduPreez/iStock/Getty Images Plus, 8, 39 (b) © sjallenphotography/iStock/Getty Images Plus, 9, 34 (tc) © Design Pics/Getty Images Plus, 10 © NA/Ablestock.com/Getty Images Plus, 11, 39 (tl) © Alejandro Sanz Torrente/iStock/Getty Images Plus, 12, 35 (br) © Design Pics/Getty Images Plus, 14 © Oksana Byelikova/iStock/Getty Images Plus, 15 © manxman/iStock/Getty Images Plus, 16 © Getty Images Plus, 17 ©Jupiterimages/Photos.com/Getty Images Plus, 18, 35 (cr) © Robby Norman/iStock/Getty Images Plus, 19 © Hemera Technologies/Photos.com/Getty Images Plus, 21, 35 (bl) © Tom Brakefield/Stockbyte/Getty Images Plus, 22 (tl) © Tom Tietz/iStock/Getty Images Plus, 22 (c), 34 (tr) © Purestock/Getty Images Plus, 23 © Lynn_Bystrom/iStock/Getty Images Plus, 24 © cpaulfell/iStock/Getty Images Plus, 25 © EJ-J/iStock/Getty Images Plus, 26 © Petri Nordlund/iStock/Getty Images Plus, 27 © Roman Krochuk/iStock/Getty Images Plus, 29 © Larry Masseth/iStock/Getty Images Plus, 30 ©Todd Arena/iStock/Getty Images Plus, 31 © Ken Taylor/iStock/Getty Images Plus, 32, 35 (tr), 36 © Tyler Olson/Hemera/Getty Images Plus, 37 © Galyna Andrushko/Hemera/Getty Images Plus, 38 (tl) © Yevgen Kotyukh/iStock/Getty Images Plus, 38 (b) © Frank Hildebrand/iStock/Getty Images Plus, 39 (tr) © Tom Tietz/iStock/Getty Images Plus.
Photo Credits: cover, tp © Dan Rossini/iStock/Thinkstock, 3: ©Monkey Business Images/Monkey Business/Getty Images Plus, 4, 5: ©Jack Hollingsworth/Digital Vision/Getty Images Plus, 4, 13, 34 ((tr): ©Wavebreakmedia Ltd/Wavebreak Media/Getty Images Plus, 4, 21: ©Vrabelpeter1/iStock/Getty Images Plus, 6, 36: ©Fuse/Getty Images Plus, 7: ©Kraig Scarbinsky/Digital Vision/Getty Images Plus, 8, 38 (cl): ©Pamela Uyttendaele/iStock/Getty Images Plus, 9: ©Sevaljevic/iStock/Getty Images Plus, 10: ©Leah-Anne Thompson/iStock/Getty Images Plus, 11, 39 (tl): ©Kenishirotie/iStock/Getty Images Plus, 12, 38 (cr): ©Demid Borodin/iStock/Getty Images Plus, 14: ©MilaSemenova/iStock/Getty Images Plus, 15, 38 (b): ©Fuse/Getty Images Plus16: ©Pavel Semenov/Hemera/Getty Images Plus, 17, 39 (b): ©George Doyle/Stockbyte/Getty Images Plus, 18, 39 (tr): ©hammondovi/iStock/Getty Images Plus, 19, 35 (bl): ©Jupiterimages/Stockbyte/Getty Images Plus, 20: ©Jupiterimages/Stockbyte/Getty Images Plus, 22: ©Santje09/iStock/Getty Images Plus, 23: ©Fuse/Getty Images Plus, 24, 34 (cl): ©Claude Beaubien/Hemera/Getty Images Plus, 25 ©Hallgerd/iStock/Getty Images Plus, 26, 34 (br): ©Valueline/Valueline/Getty Images Plus, 27: ©Sadik Demiroz/Hemera/Getty Images Plus, 28, 35 (tr): ©Fuse/Getty Images Plus, 29, 37: ©Jupiterimages/Photos.com/Getty Images Plus, 30 ©David Sacks/Digital Vision/Getty Images Plus, 31: ©Jupiterimages/Goodshot/Getty Images Plus, 32, 35 (tl): ©Christina Richards/iStock/Getty Images Plus.
Photo Credits : cover, tp: ©Dainis Derics/iStock/Getty Images Plus, 3: ©KirS-UA/iStock/Getty Images Plus, 4, 5: ©Kenneth Schulze/iStock/Getty Images Plus, 4, 15: ©Kim Steele/Photodisc/Getty Images Plus, 4, 21: ©Iwona Grodzka/iStock/Getty Images Plus, 6: ©Minerva Studio/iStock/Getty Images Plus, 7, 34 (br): ©Tony Campbell/iStock/Getty Images Plus, 8: ©Yuan Zhang/iStock/Getty Images Plus, 9: ©Hemera Technologies/Ablestock.com/Getty Images Plus, 10, 35 (bl): ©Comstock/Stockbyte/Getty Images Plus, 11, 36: ©Maurizio Camerin/Hemera/Getty Images Plus, 11 (cr) ©Annette Dieter/iStock/Getty Images Plus, 12, 35 (tl): ©Edmunds Dana/Perspectives/Getty Images, 13, 34 (cl): ©luminouslens/iStock/Getty Images Plus, 14, 35 (tr): ©SeanMartin/iStock/Getty Images Plus, 16: ©Paulus Rusyanto/iStock/Getty Images Plus, 17: ©Zasili/iStock/Getty Images Plus, 18, 38 (b): ©Arnel Manalang/iStock/Getty Images Plus, 19, 37: ©Digital Vision./Photodisc/Getty Images Plus, 20: ©Jay P. Morgan/iStock/Getty Images Plus, 22, 38 (cl): ©Lisa F. Young/iStock/Getty Images Plus, 23: ©Chad Baker, Jason Reed, Ryan McVay/Photodisc/Getty Images Plus, 24, 39 (cl): ©Fuse/Getty Images Plus, 25, 38 (cr): ©Comstock/Stockbyte/Getty Images Plus, 26, 39 (b) ©Johnny Greig/iStock/Getty Images Plus, 27, 39 (tr): ©Nikita Sobolkov/iStock/Getty Images Plus, 28: ©Terrance Emerson/Hemera/Getty Images Plus, 29, 34 (tr): ©Alena Brozova/iStock/Getty Images Plus, 30: ©Lisa F. Young/iStock/Getty Images Plus, 31: ©Laurie Bell/iStock/Getty Images Plus, 32, 37 (br): ©Purestock/Getty Images Plus, 32 (cr): ©Donald Johansson/iStock/Getty Images Plus.
Book 9:
Nature's Engineers
Photo Credits: cover, tp: ©Dan Whobrey/iStock/Getty Images Plus, 3: ©sasel77/iStock/Getty Images Plus, 4, 5, 38 (cl): ©Dorling Kindersley/Getty Images Plus, 4, 13, 34 (br): ©Jeff Strickler/iStock/Getty Images Plus, 4, 25: ©Kirill Zdorov/iStock/Getty Images Plus, 6: ©Joel Carillet/iStock/Getty Images Plus, 7: ©Piter1977/iStock/Getty Images Plus, 8, 34 (cl) ©johnandersonphoto/iStock/Getty Images Plus, 9, 38 (cr): ©Songsak Paname/iStock/Getty Images Plus, 10: ©Katarzyna Mazurowska/iStock/Getty Images Plus, 10 (cr), 36: ©Yuri Maryunin/iStock/Getty Images Plus, 11, 34 (tr): ©Glenn Antecki/iStock/Getty Images Plus, 12: ©Dmitriy Kalinin/iStock/Getty Images Plus, 14: ©Mike Kiev/iStock/Getty Images Plus, 15: ©Harry Thomas/iStock/Getty Images Plus, 16: ©Keith Spaulding/iStock/Getty Images Plus, 17 ©Tim Markley/Hemera/Getty Images Plus, 18, 37 (tr), 39 (cr): ©Clayton Sharrard/iStock/Getty Images Plus, 19: ©BRIAN LASENBY/iStock/Getty Images Plus, 20, 38 (b): ©evgeny tsapov/iStock/Getty Images Plus, 21, 35 (tr), 39 (b): ©Ruvan Boshoff/iStock/Getty Images Plus, 22: ©VincentEOS/iStock/Getty Images Plus, 23 ©Morley Read/iStock/Getty Images Plus, 24: ©christophe rouziou/iStock/Getty Images Plus, 26: ©William Johnston/iStock/Getty Images Plus, 27, 37 (br): ©Fuse/Getty Images Plus, 28: ©Meinzahn/iStock/Getty Images Plus, 29, 35 (tl): ©Robert Kacpura/iStock/Getty Images Plus, 30, 39 (cl): ©Tim Laman/National Geographic/Getty Images, 31, 35 (bl): ©Jim Mills/iStock/Getty Images Plus, 32 ©Pawel Worytko/Hemera/Getty Images Plus.
Book 10:
Pushing and Pulling
Photo Credits: cover, tp: ©Purestock/Getty Images Plus, 3: ©David Woolley/Digital Vision/Getty Images Plus, 4, 5: ©Chad Baker, Jason Reed, Ryan McVay/Photostock/Getty Images Plus, 4, 15: ©Keith Levit Photography/Keith Levit Photography/Getty Images Plus, 4, 23 ©Grzegorz Kula/iStock/Getty Images Plus, 6, 34 (cl) ©Terry Vine/Blend Images/Getty Images Plus, 7, 35 (br): ©brandon beecroft/iStock/Getty Images Plus, 8: ©Brian McEntire/iStock/Getty Images Plus, 9, 38 (cl): ©BananaStock/BananaStock/Getty Images Plus, 10, 35 (tr) Donna Coleman/iStock/Getty Images Plus, 11: ©Andy Schirmer/Hemera/Getty Images Plus, 12, 37 (tr): ©Lori Sparkia/Hemera/Getty Images Plus, 13: ©BananaStock/BananaStock/Getty Images Plus, 14, 34 (br): ©Katarzyna Mazurowska/Hemera/Getty Images Plus, 16: ©Purestock/Getty Images Plus, 17, 35 (tl): ©BananaStock/BananaStock/Getty Images Plus, 18, 38 (b): ©Michael Blann/Digital Vision/Getty Images Plus, 19: ©Norbert Rehm/Hemera/Getty Images Plus, 20, 39 (tr): ©Comstock Images/Stockbyte/Getty Images Plus, 21, 34 (tr): ©Purestock/Getty Images Plus, 22: ©Vstock LLC/Vstock/Getty Images Plus, 24: ©Tammy Abrego/iStock/Getty Images Plus, 25: ©Steve Mcsweeny/iStock/Getty Images Plus, 26, 38 (cr): ©Pixland/Pixland/Getty Images Plus, 27, 39 (b): ©Sonja Foos/iStock/Getty Images Plus, 28: ©Warren Goldswain/iStock/Getty Images Plus, 29, 39 (cl): ©Matthew Jacques/iStock/Getty Images Plus, 30: ©Jupiterimages/Stockbyte/Getty Images Plus, 31: ©fotowebbox/iStock/Getty Images Plus, 32, 36: ©Christian Adams/Photographer's Choice/Getty Images, 37: ©Getty Images Plus.
Book 1:
How Animals Survive
Photo Credits: cover, tp ©Craig Dingle/iStock/Getty Images Plus; 3 ©Robert Blanchard/iStock/Getty Images Plus; 4-5 ©sewer11/iStock/Getty Images Plus; 6, 35 ©Mogens Trolle/iStock/Getty Images Plus; 7, 38 ©Doctor_bass/iStock/Getty Images Plus; 8, 38 ©Matej Hudovernik/iStock/Getty Images Plus; 9 ©Marcin Pawinski/iStock/Getty Images Plus; 10 ©Jason Crader/iStock/Getty Images Plus; 11, 38 ©StuPorts/iStock/Getty Images Plus; 12, 36 ©Purestock/Getty Images Plus; 4, 13 ©Fuse/Getty Images Plus; 14 ©Brand X Pictures/Stockbyte/Getty Images Plus; 15 (tl) ©John Carnemolla/iStock/Getty Images Plus; 15 (c) ©Schaef1/iStock/Getty Images Plus; 16, 35 ©Tom Brakefield/Stockbyte/Getty Images Plus; 17 © Tom Brakefield/Stockbyte/Getty Images Plus; 18 ©Ingram Publishing/Getty Images Plus; 19, 37 ©Antonio GAUDENCIO DA SILVA/iStock/Getty Images Plus; 20 ©Don Stevenson/Hemera/Getty Images Plus; 21, 34 ©Darren Pearson/iStock/Getty Images Plus; 22, 35 ©atese/iStock/Getty Images Plus; 4, 23 ©Anup Shah/Digital Vision/Getty Images Plus; 24, 34 ©BrianLasenby/iStock/Getty Images Plus; 25, 39 ©michaklootwijk/iStock/Getty Images Plus; 26, 39 ©Kiyoshi Takahase Segundo/iStock/Getty Images Plus; 27, 39 ©Keith Hinman/iStock/Getty Images Plus; 28 ©Digital Vision./Photodisc/Getty Images Plus; 29 ©Mimadeo/iStock/Getty Images Plus; 30 ©Hemera Technologies/Photos.com/Getty Images Plus; 31, 34 ©Richard Herrmann/Visuals Unlimited, Inc./Getty Images, 32 ©Noam Armonn/iStock/Getty Images Plus.
Photo Credits: tp ©Ingram Publishing/Getty Images Plus; 3, 38 ©Siri Stafford/Photodisc/Getty Images Plus; 4, 5 ©Kameel/iStock/Getty Images Plus; 4, 11 ©intek1/iStock/Getty Images Plus; 4, 15 ©Design Pics, Allan Seiden/Getty Images Plus; 4, 21 ©SkyF/iStock/Getty Images Plus; 4, 21 ©SkyF/iStock/Getty Images Plus; 6, 34, 37 ©Martin Poole/Photodisc/Getty Images Plus; 7 ©Thomas Northcut/Digital Vision/Getty Images Plus; 8, 36 ©Design Pics/Getty Images Plus; 9, 39 ©Igor Stevanovic/iStock/Getty Images Plus; 10, 35 ©Mike Kiev/iStock/Getty Images Plus; 12, 13 ©Top Photo Corporation/Top Photo Group/Getty Images Plus; 14 ©Vitaliy Pakhnyushchyy/iStock/Getty Images Plus; 16 ©Fuse/Getty Images Plus; 17, 34 ©Daniel Slocum/iStock/Getty Images Plus; 18 ©Zoonar, N.Okhitin/Zoonar/Getty Images Plus; 18 ©Zoonar, N.Okhitin/Zoonar/Getty Images Plus; 19 (tc) ©slav/iStock/Getty Images Plus; 19 (cr) ©Noah Strycker/iStock/Getty Images Plus; 19 (cl) ©hudiemm/iStock/Getty Images Plus; 20 ©Marilyn Barbone/iStock/Getty Images Plus; 22 ©AlinaMD/iStock/Getty Images Plus; 23, 34 ©SZE FEI WONG/iStock/Getty Images Plus; 24, 35 ©Jupiterimages/Stockbyte/Getty Images Plus; 25, 38 ©tomgigabite/iStock/Getty Images Plus; 26, 38 ©Marcia Straub/iStock/Getty Images Plus; 28, 39 ©Maya Kovacheva Photography/iStock/Getty Images Plus; 29 ©Pauliene Wessel/Hemera/Getty Images Plus; 30, 35 ©Dmitriy Lesnyak/iStock/Getty Images Plus; 31 ©gece33/iStock/Getty Images Plus; 32 ©AdamG1975/iStock/Getty Images Plus
Book 3:
Sounds All Around
Photo Credits: cover, tp ©Nicholas Burningham/iStock/Getty Images Plus; 3 ©Sean Nel/iStock/Getty Images Plus; 4, 5 ©Thomas Northcut/Photodisc/Getty Images Plus; 4 ©Lori Sparkia/iStock/Getty Images Plus; 4, 30, 37 ©TheBiggles/iStock/Getty Images Plus; 6 ©Svitlana Pavzyuk/iStock/Getty Images Plus; 7 ©Fuse/Getty Images Plus; 8, 34 ©Konrad Steynberg/iStock/Getty Images Plus; 9, 35 ©Tammy Bryngelson/iStock/Getty Images Plus; 10 ©ConstantinosZ/iStock/Getty Images Plus; 12, 35 ©Dorling Kindersley/Getty Images Plus; 13 ©Jovo Marjanovic/iStock/Getty Images Plus; 14, 38 ©Procy_ab/iStock/Getty Images Plus; 15, 34 ©Stockbyte/Stockbyte/Getty Images Plus; 16 ©Arpad Benedek/iStock/Getty Images Plus; 17 ©Jupiterimages/Photos.com/Getty Images Plus; 18 ©Fuse/Getty Images Plus; 19 ©Ashley Pickering/iStock/Getty Images Plus; 20, 38 ©micut/iStock/Getty Images Plus; 21 ©Purestock/Getty Images Plus; 22 ©Eric Isselée/iStock/Getty Images Plus; 23, 38 ©Dreamwalker_T/iStock/Getty Images Plus; 24 ©Clint Spencer/iStock/Getty Images Plus; 25 ©Alida Vanni/iStock/Getty Images Plus; 26, 39 ©Mr. Jan Doddy/iStock/Getty Images Plus; 27, 35 ©Aaron Kohr/iStock/Getty Images Plus; 28, 39 ©Creatas Images/Creatas/Getty Images Plus; 29 ©Mike Powell/Digital Vision/Getty Images Plus; 31, 39 ©monkeybusinessimages/iStock/Getty Images Plus; 32, 34 ©ShaneGross/iStock/Getty Images Plus.
Book 4:
Cycles in the Sky
Photo Credits: cover, tp ©David De Lossy/Photodisc/Getty Images Plus; 3 ©Neven Bijelic/iStock/Getty Images Plus; 4, 5 ©Digital Vision./Photodisc/Getty Images Plus; 4, 15, 39 ©davincidig/iStock/Getty Images Plus; 4, 27, 35 ©Jesse Kunerth/iStock/Getty Images Plus; 6 ©Keith Levit/Keith Levit Photography/Getty Images Plus; 7 ©loongar/iStock/Getty Images Plus; 8, 36 ©Luciano Meirelles/Hemera/Getty Images Plus; 9, 35 ©sébastien decoret/iStock/Getty Images Plus; 10, 34 ©Zoonar, N.Okhitin/Zoonar/Getty Images Plus; 11, 38 ©Pawel Gaul/iStock/Getty Images Plus; 12 ©Torsakarin/iStock/Getty Images Plus; 13, 38 ©Torsakarin/iStock/Getty Images Plus; 14, 38 ©dibrova/iStock/Getty Images Plus; 16 ©Tatyana Chernyak/Hemera/Getty Images Plus; 17 ©GRAWLLF/iStock/Getty Images Plus; 18 ©Smileus/iStock/Getty Images Plus; 19 ©Purestock/Getty Images Plus; 20 ©Medioimages, Photodisc/Photodisc/Getty Images Plus; 21 ©jeancliclac/iStock/Getty Images Plus; 22 ©klagyivik/iStock/Getty Images Plus; 23 ©Larry Landolfi/Photo Researchers/Getty Images; 24, 34 ©Ai-Lan Lee/iStock/Getty Images Plus; 25, 35 ©knowlesgallery/iStock/Getty Images Plus; 26, 34 ©David Carillet/iStock/Getty Images Plus; 28 ©peresanz/iStock/Getty Images Plus; 29 ©Photos.com/Photos.com/Getty Images Plus; 30, 39 ©Mark Rasmussen/iStock/Getty Images Plus; 31, 39 ©ShinOkamoto/iStock/Getty Images Plus; 32, 37 ©tobkatrina/iStock/Getty Images Plus
Photo Credits: cover, tp ©Fuse/Getty Images Plus; 3, 24 ©Tier Images/iStock/Getty Images Plus; 4, 5 ©MichalisK/iStock/Getty Images Plus; 4, 15 ©Jupiterimages/Photos.com/Getty Images Plus; 4, 25 ©Eric Isselée/iStock/Getty Images Plus; 6 ©arc130/iStock/Getty Images Plus; 7 ©Anup Shah/Photodisc/Getty Images Plus; 8 ©Zoonar RF/Zoonar/Getty Images Plus; 9, 36 ©freebilly/iStock/Getty Images Plus; 10, 34 ©Getty Images Plus; 11 ©CathyKeifer/iStock/Getty Images Plus; 12 ©moodboard/moodbaord/Getty Images Plus; 13 ©Jacky/iStock/Getty Images Plus; 14 (t) ©Suzann Julien/iStock/Getty Images Plus; 14 (c) ©IcarusImages/iStock/Getty Images Plus; 16 ©worklater1/iStock/Getty Images Plus; 17 ©Comstock Images/Stockbyte/Getty Images Plus; 18, 35 ©dirk ercken/iStock/Getty Images Plus; 19, 35 ©Shoemcfly/iStock/Getty Images Plus; 20, 39 ©FtLaudGirl/iStock/Getty Images Plus; 21, 35 ©Humpata/iStock/Getty Images Plus; 22 ©Jupiterimages/Photos.com/Getty Images Plus; 23, 39 ©Luis Santos/iStock/Getty Images Plus; 24, 38 ©Julie Bazinet/iStock/Getty Images Plus; 26, 38 ©Eric Isselée/iStock/Getty Images Plus; 27, 34 ©leekris/iStock/Getty Images Plus; 28, 39 ©Mark Kostich/E+/Getty Images, 29 ©Rusty Dodson/iStock/Getty Images Plus; 30 ©Richard Carey/iStock/Getty Images Plus; 31, 38 ©Jason Isley-Scubazoo/Science Faction/Getty Images, 32 ©colimachon/iStock/Getty Images Plus
Photo Credits: cover, tp ©Ingram Publishing/Getty Images Plus; 3, 34 ©Pavlo Vakhrushev/iStock/Getty Images Plus; 4, 5 ©Matt Gibson/iStock/Getty Images Plus; 4, 13 ©christiangda/iStock/Getty Images Plus; 4, 23 ©FreshPaint/iStock/Getty Images Plus; 6 ©Rayes/Photodisc/Getty Images Plus; 7 ©David De Lossy/Photodisc/Getty Images Plus; 8, 39 ©IgorKirillov/iStock/Getty Images Plus; 9, 36 ©Monia33/iStock/Getty Images Plus; 10, 38 ©Getty Images Plus/Stockbyte/Getty Images Plus; 11, 38 ©Nickolay Khoroshkov/iStock/Getty Images Plus; 12 ©Josh Schutz/iStock/Getty Images Plus; 14 ©Mr.Sakkarin Chinsoi/iStock/Getty Images Plus; 15, 34 ©Fuse/Getty Images Plus; 16, 35 ©Purestock/Getty Images Plus; 17 ©thisisaghosttown/iStock/Getty Images Plus; 18 ©Sergey Ilin/iStock/Getty Images Plus; 19 ©photos_martYmage/iStock/Getty Images Plus; 20, 37 ©Ron Chapple Stock/Ron Chapple Studios/Getty Images Plus; 21 ©ames steidl/iStock/Getty Images Plus; 22, 35 ©voltan1/iStock/Getty Images Plus; 24, 35 ©Getty Images Plus Images/Stockbyte/Getty Images Plus; 25 ©Mariusz Świtulski/iStock/Getty Images Plus; 26 ©Digital Vision./Photodisc/Getty Images Plus; 27, 34 ©Oscar Calero/iStock/Getty Images Plus; 28, 38 ©Cathy Keifer/Hemera/Getty Images Plus; 29, 39 ©Glenn Young/Hemera/Getty Images Plus; 30, 39 ©Rick Whitacre/iStock/Getty Images Plus; 31 ©Design Pics, Carl Shaneff/ Getty Images Plus; 32, 37 ©encklc/iStock/Getty Images Plus
Photo Credits: cover, tp ©Eric Gevaert/Hemera/Getty Images Plus; 3 ©John Carnemolla/iStock/Getty Images Plus; 4, 5 ©Nico Smit/iStock/Getty Images Plus; 4, 19 ©Sergei Gorshkov/iStock/Getty Images Plus; 4, 25 ©Henrik Äijä/iStock/Getty Images Plus; 6, 38 ©Scott Leman/iStock/Getty Images Plus; 7 ©Linda Macpherson/iStock/Getty Images Plus; 8, 36 ©Cheryl Davis/iStock/Getty Images Plus; 9, 34 ©Dorling Kindersley/Getty Images Plus; 10 ©Richard Haines/iStock/Getty Images Plus; 11 ©Vendula Kuncova/iStock/Getty Images Plus; 12, 38 ©Anup Shah/Digital Vision/Getty Images Plus; 13 ©Anup Shah/Digital Vision/Getty Images Plus; 14, 35 ©Mahmoud Kabalan/iStock/Getty Images Plus; 15, 38 ©benmoat/iStock/Getty Images Plus; 16 ©Vampirica/iStock/Getty Images Plus; 17, 34 ©halbrindley/iStock/Getty Images Plus; 18 ©uros ravbar/iStock/Getty Images Plus; 20 ©Dan Whobrey/iStock/Getty Images Plus; 21, 35 ©Renate Smitham/iStock/Getty Images Plus; 22, 34 ©Little_Things/iStock/Getty Images Plus; 23 ©BackyardProduction/iStock/Getty Images Plus; 24, 37 ©Olga N. Vasik/iStock/Getty Images Plus; 26, 39 ©guenter-foto/iStock/Getty Images Plus; 27, 37 ©Jason Prince/iStock/Getty Images Plus; 28, 39 ©erniedecker/iStock/Getty Images Plus; 29 ©Johan Swanepoel/iStock/Getty Images Plus; 30, 39 ©cchoc/iStock/Getty Images Plus; 31, 35 ©Hiroya Minakuchi/Minden Pictures/Getty Images; 32 ©Wavebreakmedia Ltd/Wavebreak Media/Getty Images Plus
Book 8:
Shorter and Longer Days
Photo Credits: cover, tp ©Comstock Images/Stockbyte/Getty Images Plus; 3 ©Ingram Publishing/Getty Images Plus; 4, 5 ©monkeybusinessimages/iStock/Getty Images Plus; 4, 13 ©david franklin/iStock/Getty Images Plus; 4, 23 ©kertlis/iStock/Getty Images Plus; 6, 35 ©Dorling Kindersley/Getty Images Plus; 7 ©natasa radic/iStock/Getty Images Plus; 8, 35 ©Iakov Kalinin/iStock/Getty Images Plus; 9 ©Robby Norman/iStock/Getty Images Plus; 10, 35 ©Fuse/Getty Images Plus; 11, 34 ©Andrew_Mayovskyy/iStock/Getty Images Plus; 12, 36 ©Ariel Skelley/Blend Images/Getty Images Plus; 14 ©Harizmik/iStock/Getty Images Plus; 15 ©Elena Volkova/iStock/Getty Images Plus; 16, 37 ©Dmitriy Shironosov/iStock/Getty Images Plus; 17 ©Fuse/Getty Images Plus; 18, 39 ©Cameron Whitman/iStock/Getty Images Plus; 19 ©darren baker/iStock/Getty Images Plus; 20 ©Alan Lagadu/iStock/Getty Images Plus; 21, 38 ©Jill Chen/iStock/Getty Images Plus; 22, 38 ©Naomi Bassitt/iStock/Getty Images Plus; 24, 38 ©Tyler Olson/Hemera/Getty Images Plus; 25, 34 ©Jupiterimages/Photos.com/Getty Images Plus; 26 ©BananaStock/BananaStock/Getty Images Plus; 27 ©Jupiterimages/liquidlibrary/Getty Images Plus; 28, 39 ©Elena Elisseeva/iStock/Getty Images Plus; 29, 34 ©Markus Guhl/iStock/Getty Images Plus; 30, 39 ©Cheryl Davis/Hemera/Getty Images Plus; 31 ©Ron Chapple Stock/Ron Chapple Stock/Getty Images Plus; 32 ©Sonya Etchison/Hemera/Getty Images Plus
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Book 10:
Learning from the Beast!
Photo Credits: cover, tp ©erniedecker/iStock/Getty Images Plus; 3, 39 ©Ron Chapple Stock/Ron Chapple Stock/Getty Images Plus; 4, 5 ©Photodisc/Photodisc/Getty Images Plus; 4, 13 ©fotowebbox/iStock/Getty Images Plus; 4, 23 ©mandygodbehear/iStock/Getty Images Plus; 6, 34 ©Fiona Ayerst/iStock/Getty Images Plus; 7, 34 ©Tuomas Kujansuu/iStock/Getty Images Plus; 8, 35 ©Dirk Freder/iStock/Getty Images Plus; 9, 35 ©thomas hansson/iStock/Getty Images Plus; 10, 35 ©Elizabeth Oneill/iStock/Getty Images Plus; 11, 35 ©George Doyle/Stockbyte/Getty Images Plus; 12, 36 ©Maxal Tamor/iStock/Getty Images Plus; 12, 36 ©Alex Goldblum/iStock/Getty Images Plus; 14, 38 ©Richard Carey/iStock/Getty Images Plus; 15, 38 ©Jose antonio Sanchez reyes/Hemera/Getty Images Plus; 16 ©Design Pics/Getty Images Plus; 17, 39 ©Steen Wackerhausen/Hemera/Getty Images Plus; 18 ©Dimitar Dimitrov/iStock/Getty Images Plus; 19 ©Valeriy Kirsanov/iStock/Getty Images Plus; 20 ©Lars Christensen/iStock/Getty Images Plus; 21 ©Fuse/Getty Images Plus; 22 ©Harald Richter/iStock/Getty Images Plus; 24, 38 ©john henderson/iStock/Getty Images Plus; 25 ©Judy Kennamer/iStock/Getty Images Plus; 26, 34 ©Fuse/Getty Images Plus; 27, 34 ©Aigars Reinholds/iStock/Getty Images Plus; 28, 34 ©graytln/iStock/Getty Images Plus; 29, 34 ©Stocktrek Images/Stocktrek Images/Getty Images Plus; 30 (tl), 35, 37 ©ideeone/iStock/Getty Images Plus; 30 (c), 35 ©Issaurinko/iStock/Getty Images Plus; 31 (tl) ©Nicholas Rjabow/iStock/Getty Images Plus; 31 (cl), 39 ©Bettina Baumgartner/iStock/Getty Images Plus; 32 (t) ©Fuse/Getty Images Plus; 32 (c) ©Ameng Wu/iStock/Getty Images Plus
Book 1:
What's the Matter?
Photo Credits: cover, tp, 34 (bl) ©Lori Sparkia/Hemera/Getty Images Plus; 3 ©Ryan McVay/Photodisc/Getty Images Plus; 4, 5 ©Digital Vision./Photodisc/Getty Images Plus; 4, 17 ©Top Photo Group/Top Photo Group/Getty Images Plus; 4, 23 ©Tetiana Vitsenko/iStock/Getty Images Plus; 6 ©Robert Becker/iStock/Getty Images Plus; 7 ©Asta Zaborskyte/iStock/Getty Images Plus; 8 ©Ingram Publishing/Getty Images Plus; 9 ©Tanya Puntti/iStock/Getty Images Plus; 10 ©Pavel Cheiko/iStock/Getty Images Plus; 11 ©shootmfshoot/iStock/Getty Images Plus; 12 ©yomoyo/iStock/Getty Images Plus; 13, 38 (cr) ©Donna Gentile/iStock/Getty Images Plus; 14, 35 (tr) ©Alexander Den/iStock/Getty Images Plus; 15, 36 ©Getty Images Plus; 16, 38 (b) ©Focus_on_Nature/iStock/Getty Images Plus; 18, 35 (bl), 37 (tr) ©Phil Ashley/Photodisc/Getty Images Plus; 19 ©Miles Higgins/iStock/Getty Images Plus; 20, 34 (tr) ©Denisa - Carmen VOICU/iStock/Getty Images Plus; 21 ©Aleksandar Jocic/iStock/Getty Images Plus; 22, 34 ©Chepko Danil/iStock/Getty Images Plus; 24, 39 (b) ©Purestock/Getty Images Plus; 25, 35 (tl) ©Fuse/Getty Images Plus; 26 ©Julien Grondin/iStock/Getty Images Plus; 27, 37 (br) ©Brian Weed/Hemera/Getty Images Plus; 28, 39 (cr) ©Digital Vision./Digital Vision/Getty Images Plus; 29 ©Keith Levit/Keith Levit Photography/Getty Images Plus; 30 ©Patrick Poendl/iStock/Getty Images Plus; 31 ©Agnyeshka/iStock/Getty Images Plus; 32 (cr), 39 (cl) ©Ruth Black/iStock/Getty Images Plus; 32 (tl) ©Elitsa Lambova/iStock/Getty Images Plus
Book 2:
What Can We Make with This?
Photo Credits: cover, tp ©Feng Yu/iStock/Getty Images Plus; 3, 36 ©Roberto Marinello/Hemera/Getty Images Plus; 4, 5 ©Arthur Preston/iStock/Getty Images Plus; 4, 13, 38 (b) ©Gilles_Paire/iStock/Getty Images Plus; 4, 25 ©Andrea Pelletier/iStock/Getty Images Plus; 6 ©schulzie/iStock/Getty Images Plus; 7 ©Ingram Publishing/Getty Images Plus; 8, 35 (bl), 39 (tr) ©Steven Heap/iStock/Getty Images Plus; 9 ©xyno/iStock/Getty Images Plus; 10 ©Design Pics/Getty Images Plus; 11 ©Darko Ivanovic/iStock/Getty Images Plus; 12, 34 (tr) ©CarlosAndreSantos/iStock/Getty Images Plus; 14 ©gprentice/iStock/Getty Images Plus; 15 ©Stacey Bates/iStock/Getty Images Plus; 16 ©lnzyx/iStock/Getty Images Plus; 17, 34 (br) ©fotografiche/iStock/Getty Images Plus; 18, 38 (cl) ©John Carvalho/iStock/Getty Images Plus; 19, 37 ©Hemera Technologies/AbleStock.com/Getty Images Plus; 20 ©moodboard/moodboard/Getty Images Plus; 21 ©Yuriy Chaban/iStock/Getty Images Plus; 22, 39 (b) ©AigarsR/iStock/Getty Images Plus; 23, 34 (cl) ©Photodisc/Photodisc/Getty Images Plus; 24 ©Ableimages/Photodisc/Getty Images Plus; 26, 35 (tl) ©AlessandroColle/iStock/Getty Images Plus; 27 ©rusgri/iStock/Getty Images Plus; 28, 39 (cl) ©jared delariman/iStock/Getty Images Plus; 29 ©Hung Chung Chih/iStock/Getty Images Plus; 30 ©David Spieth/iStock/Getty Images Plus; 31, 35 (tr), 38 (cr) ©bjenkin/iStock/Getty Images Plus; 32 ©monkeybusinessimages/iStock/Getty Images Plus
Book 3:
A New Plant Grows
Photo Credits: cover, tp ©Design Pics/Getty Images Plus; 3 ©Martin Poole/Photodisc/Getty Images Plus; 4, 5 ©Maximkostenko/iStock/Getty Images Plus; 4, 13 ©Lucy Clark/iStock/Getty Images Plus; 4, 19 ©Letizia Tomasso/iStock/Getty Images Plus; 6, 35 (bl) ©leonid4210/iStock/Getty Images Plus; 7, 39 (tr) ©Vladimir Surkov/iStock/Getty Images Plus; 8, 39 (cl) ©Smileus/iStock/Getty Images Plus; 9, 38 (b) ©TodorovNikifor/iStock/Getty Images Plus; 10, 34 (cl) ©iStock/Getty Images Plus; 11, 34 (br) ©mamaPoli/iStock/Getty Images Plus; 12 ©Digital Vision./Digital Vision/Getty Images Plus; 14 ©Daniel Parent/iStock/Getty Images Plus; 15, 35 (tl) ©Pavlo Sachek/iStock/Getty Images Plus; 16 ©hannepii/iStock/Getty Images Plus; 17 ©Dmitry Maslov/iStock/Getty Images Plus; 18 ©supernitram/iStock/Getty Images Plus; 20 ©Roger Milego/iStock/Getty Images Plus; 21, 38 (cr) ©Worakit Sirijinda/iStock/Getty Images Plus; 22, 38 (cl) ©Leopardinatree/iStock/Getty Images Plus; 23, 36 ©iChip/iStock/Getty Images Plus; 24 ©ideeone/iStock/Getty Images Plus; 25 ©Denis Pepin/iStock/Getty Images Plus; 26 ©Bry Patrickson/iStock/Getty Images Plus; 27, 39 (b) ©Dennis Maloney/iStock/Getty Images Plus; 28, 34 (tr) ©Alex Bramwell/iStock/Getty Images Plus; 29 ©bdspn/iStock/Getty Images Plus; 30, 35 (tr) ©plusphoto/iStock/Getty Images Plus; 31 ©Somsak Sudthangtum/iStock/Getty Images Plus; 32 ©matka_Wariatka/iStock/Getty Images Plus
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Book 5:
Let's Build Something
Photo Credits: cover, tp ©Vtsybulka/iStock/Getty Images Plus; 3 ©Erikas Putrius/iStock/Getty Images Plus; 4, 5 ©mkistryn/Getty Images Plus; 4, 19 ©Joshua Haviv/iStock/Getty Images Plus; 4, 25, 38 (b) ©Thomas Brown/Digital Vision/Getty Images Plus; 6 ©Dmitry Kalinovsky/iStock/Getty Images Plus; 7 ©Michael Blann/Digital Vision/Getty Images Plus; 8 ©wzfs1s/iStock/Getty Images Plus; 9 ©AndresGarciaM/iStock/Getty Images Plus; 10, 37 ©Medioimages/Photodisc/Photodisc/Getty Images Plus; 11 ©John Leung/iStock/Getty Images Plus; 12, 35 (bl) ©James Martin/iStock/Getty Images Plus; 13 ©Photodisc/Digital Vision/Getty Images Plus; 14, 38 (cl) ©mariusz_prusaczyk/iStock/Getty Images Plus; 15 ©ChrisPole/iStock/Getty Images Plus; 16, 39 (b) ©2nix/iStock/Getty Images Plus; 17, 39 (cl) ©Zoonar/N.Okhitin/Zoonar/Getty Images Plus; 18 ©Vitaly Titov/iStock/Getty Images Plus; 20, 38 (cr) ©ArevHamb/iStock/Getty Images Plus; 21 ©amit erez/iStock/Getty Images Plus; 22, 39 (cr) ©Lars Borges/Getty Images/Stone; 23, 35 (tr) ©Christian Aslund/Getty Images/Photograper’s Choice; 24 ©michaklootwijk/iStock/Getty Images Plus; 26 ©Matthew Ragen/iStock/Getty Images Plus; 27, 34 (br) ©Comstock/Stockbyte/Getty Images Plus; 28, 34 (tr) ©Huntstock/Getty Images Plus; 29, 34 (cl), 36 ©Alexander Hassenstein/Digital Vision/Getty Images Plus; 30, 35 (tl) ©ADRIANO PECCHIO/iStock/Getty Images Plus; 31 ©galdzer/iStock/Getty Images Plus; 32 ©Oleg Mitiukhin/iStock/Getty Images Plus
Photo Credits: cover, tp ©Fuse/Getty Images Plus; 3 ©studioworxx/iStock/Getty Images Plus; 4, 5, 34 (cl) ©Stockbyte/Stockbyte/Getty Images Plus; 4, 9 ©Guido Rosa/Getty Images/Ikon Images; 4, 17, 38 (cl) ©Ingram Publishing/Getty Images Plus; 4, 23 ©Emily Churchill/iStock/Getty Images Plus; 6 ©gabylegeai/iStock/Getty Images Plus; 7, 34 (tr) ©Comstock/Stockbyte/Getty Images Plus; 8 ©cjkitts/iStock/Getty Images Plus; 10, 35 (bl) ©Pete Oxford/Getty Images/Minden Pictures; 11, 39 (cr) ©Amornthep Chotchuang/iStock/Getty Images Plus; 12 ©GWMB/iStock/Getty Images Plus; 13, 36 ©Eduardo Mariano Rivero/iStock/Getty Images Plus; 14, 35 (tr) ©Zoonar RF/Zoonar/Getty Images Plus; 15, 39 (b) ©Brandon Alms/iStock/Getty Images Plus; 16 ©Zoonar RF/Zoonar/Getty Images Plus; 16 (cr), 38 (b) ©Michael Zysman/Hemera/Getty Images Plus; 18, 34 (br) ©Anup Shah/Photodisc/Getty Images Plus; 19, 38 (cr) ©Comstock Images/Stockbyte/Getty Images Plus; 20, 37 ©Anup Shah/Digital Vision/Getty Images Plus; 21 ©Lauren Darcey/Hemera/Getty Images Plus; 22 ©Anup Shah/Digital Vision/Getty Images Plus; 24, 35 (tl) ©Stewart Sutton/Photodisc/Getty Images Plus; 25 ©Robert Vautour/iStock/Getty Images Plus; 26 ©kkgas/iStock/Getty Images Plus; 27 ©Grigorii_Pisotckii/iStock/Getty Images Plus; 28 ©Michelle Malven/iStock/Getty Images Plus; 29 ©Chris Wolf/iStock/Getty Images Plus; 30 ©sekernas/iStock/Getty Images Plus; 31, 39 (cl) ©Stanislav Volik/Hemera/Getty Images Plus; 32 ©Jupiterimages/Photos.com/Getty Images Plus
Book 7:
Water, Water, Everywhere
Photo Credits: cover, tp ©Fuse/Getty Images Plus; 3 ©Andrei Radzkou/iStock/Getty Images Plus; 4, 5 ©Lalith_Herath/iStock/Getty Images Plus; 4, 19, 38 (b) ©On-Air/iStock/Getty Images Plus; 4, 27 ©Alleyn Plowright/iStock/Getty Images Plus; 6, 39 (cl) ©ihar kolas/iStock/Getty Images Plus; 7 ©Rayes/Digital Vision/Getty Images Plus; 8©NagyDodo/iStock/Getty Images Plus; 9 ©Christian Schuster/iStock/Getty Images Plus; 10 ©Da_Ma/iStock/Getty Images Plus; 11 ©Ingram Publishing/Getty Images Plus; 12 ©Purestock/Getty Images Plus; 13 ©Purestock/Getty Images Plus; 14, 35 (tl) ©KulikovaN/iStock/Getty Images Plus; 15, 35 (bl) ©Todor Tcvetkov/iStock/Getty Images Plus; 16 ©Maksimchuk Vitaly/iStock/Getty Images Plus; 17 ©Photos.com/Photos.com/Getty Images Plus; 18, 34 (cl) ©MizC/iStock/Getty Images Plus; 20, 38 (cl) ©Timothy Large/iStock/Getty Images Plus; 21, 34 (br) ©Jacek Sasin/iStock/Getty Images Plus; 22 ©Baloncici/iStock/Getty Images Plus; 23, 34 (tr) ©Timothy Collins/iStock/Getty Images Plus; 24 ©sezer66/iStock/Getty Images Plus; 25, 35 (tr) ©Siri Stafford/Photodisc/Getty Images Plus; 26 ©TT/iStock/Getty Images Plus; 28, 39 (b) ©Monkey Business Images/Monkey Business/Getty Images Plus; 29 ©moodboard/moodboard/Getty Images Plus; 30, 38 (cr) ©beerlogoff/iStock/Getty Images Plus; 31 ©VvoeVale/iStock/Getty Images Plus; 32, 39 (cr) ©Paula Jones/iStock/Getty Images Plus
Book 8:
Slow Changes, Fast Changes
Photo Credits: cover, tp ©wcjohnston/iStock/Getty Images Plus; 3 ©Ammit/iStock/Getty Images Plus; 4, 5 ©Heike Kampe/iStock/Getty Images Plus; 4, 15 ©freddiesfabdesign/iStock/Getty Images Plus; 4, 27 ©gitusik/iStock/Getty Images Plus; 6 ©Stephen Shankland/iStock/Getty Images Plus; 7, 35 (bl) ©Andrew Dernie/iStock/Getty Images Plus; 8, 36 ©Ingram Publishing/Getty Images Plus; 9 ©PeggyWoodsRyan/iStock/Getty Images Plus; 10, 34 (br) ©Digital Vision./Digital Vision/Getty Images Plus; 11 ©Martin Strmko/iStock/Getty Images Plus; 12, 38 (b) ©Getty Images Plus; 13, 35 (tl), 38 (cl) ©VitalyEdush/iStock/Getty Images Plus; 14, 38 (cr) ©/Getty Images Plus; 16 ©Jameson Weston/iStock/Getty Images Plus; 17, 35 (tr), 37 ©Rainer Albiez/iStock/Getty Images Plus; 18 ©Richard_Pinder/iStock/Getty Images Plus; 19, 34 (cl) ©SumikoPhoto/iStock/Getty Images Plus; 20, 39 (cl) ©Paul Baleta/iStock/Getty Images Plus; 21, 39 (cr) ©Alex_11/iStock/Getty Images Plus; 22 ©sergioboccardo/iStock/Getty Images Plus; 23 ©Sean McIntyre/iStock/Getty Images Plus; 24 ©Medioimages/Photodisc/Photodisc/Getty Images Plus; 25 ©Les Cunliffe/iStock/Getty Images Plus; 26, 39 (b) ©rusadina/iStock/Getty Images Plus; 28 ©espion/iStock/Getty Images Plus; 29 ©ShinOkamoto/iStock/Getty Images Plus; 30, 34 (tr) ©RenePi/iStock/Getty Images Plus; 31 ©Mfotophile/iStock/Getty Images Plus; 32 ©mycola/iStock/Getty Images Plus
Book 9:
Shaping The World
Photo Credits: cover, tp ©Jupiterimages/Creatas/Getty Images Plus; 3 ©Marisa Allegra Williams/iStock/Getty Images Plus; 4, 5 ©Mike Kiev/iStock/Getty Images Plus; 4, 21 ©Alexandr Ozerov/iStock/Getty Images Plus; 4, 25, 35 (bl) ©tiger_barb/iStock/Getty Images Plus; 6 ©Stocktrek Images/Stocktrek Images/Getty Images Plus; 7 ©Pawel Gaul/iStock/Getty Images Plus; 8, 34 (br) ©moodboard/moodboard/Getty Images Plus; 9, 35 (tr) ©ildogesto/iStock/Getty Images Plus; 10 ©iStock/Getty Images Plus; 11, 22 ©Ingram Publishing/Getty Images Plus; 12 ©Daniel Prudek/iStock/Getty Images Plus; 13 ©adisa/iStock/Getty Images Plus; 14 (tl) ©Arthur Holden/iStock/Getty Images Plus; 14 (c), 38 (cl) ©Igor Skrynnikov/Hemera/Getty Images Plus; 15, 38 (cr) ©bergserg/iStock/Getty Images Plus; 16, 35 (tl), 36 ©Photodisc/Photodisc/Getty Images Plus; 17 ©Armin Rose/iStock/Getty Images Plus; 18 ©Mark Strozier/iStock/Getty Images Plus; 19, 39 (cl) ©Stocktrek Images/Stocktrek Images/Getty Images Plus; 20 ©MO:SES/iStock/Getty Images Plus; 23, 34 (cl) ©Marisa Allegra Williams/iStock/Getty Images Plus; 24 ©Dorling Kindersley/Getty Images Plus; 26, 38 (b) ©ildogesto/iStock/Getty Images Plus; 27 ©Stocktrek Images/Stocktrek Images/Getty Images Plus; 28, 39 (cr) ©Liu Yin/Hemera/Getty Images Plus; 29 ©Jorgenmac/iStock/Getty Images Plus; 30, 39 (b) ©giorgos245/iStock/Getty Images Plus; 31 ©Jon Gorr/iStock/Getty Images Plus; 32 ©Stockbyte/Stockbyte/Getty Images Plus
Book 10:
Building Strong Homes
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