The Rock and Gem Book: And Other Treasures of the Natural World (DK Our World in Pictures)

Mistakes That Worked: 40 Familiar Inventions & How They Came to Be

Animal! (DK Knowledge Encyclopedias)

National Geographic Little Kids First Big Book of the Ocean (National Geographic Little Kids First Big Books)

Knowledge Encyclopedia: The World as You've Never Seen it Before (DK Knowledge Encyclopedias)

Children's Illustrated Thesaurus (DK Children's Illustrated Reference)

Knowledge Encyclopedia: Animals (Knowledge Encyclopedia For Children)

National Geographic Little Kids First Big Book of Animals (National Geographic Little Kids First Big Books)

Knowledge Encyclopedia: World History (Knowledge Encyclopedia For Children)

National Geographic Kids Animal Encyclopedia 2nd edition: 2,500 Animals with Photos, Maps, and More!