Wendy Pfeffer has written several other books for children,including From Tadpole to Frog and What's It Like to Be a Fish? both illustrated by Holly Keller. Ms. Pfeffer lives in Pennington, NJ. Holly Keller has illustrated Let's Go Rock Collecting by Roma Gans and You're Aboard Spaceship Earth by Patricia Lauber, as well as her own books starring Horace and Geraldine. Ms. Keller lives in West Redding, CT.