Sally Walker

45 books • 8 series

Early Bird Earth Science S.

Cover of Fossils

Book #3: Fossils

Cover of Minerals

Book #4: Minerals

Cover of Rocks

Book #5: Rocks

Ocean Life Mini Books

Searchlight Books - Do You Dig Earth Science?

Searchlight Books How Does Energy Work

Searchlight Books How Do Simple Machines Work

Searchlight Energy

Searchlight Machines: To The Test

Smithsonian's Backyard (Hardcover)