Kathleen Weidner Zoehfeld worked as an editor of children's books for over ten years before beginning her career as a writer. She has written two other books for the Let's-Read-and-Find-Out Science series" What Lives in a Shell?, illustrated by Helen K. Davie, and How Mountains Are Made, illustrated by James Graham Hale. Ms Zoehfeld lives in Norwalk, Connecticut.

Nadine Bernard Westcott has illustrated numerous books for children, including How to Grow a Picket Fence by Mary Louise Cuneo and two popular children's songs: There's a Hole in the Bucket and Over the River and Through the Wood. She has also illustrated another book in the Let's-Read-and-Find-Out Science series: I Can Tell by Touching by Carolyn Otto. Ms Westcott lives on Nantucket Island in Massachusetts.