- Why?: The best ever question and answer book about nature, science and the world around you (Questions and Answers Storybook)
- How?: The Most Awesome Question and Answer Book About Nature, Animals, People, Places — and You!
- Why Does Popcorn Pop?: and Other Kitchen Questions (Questions and Answers Storybook)
- Why Is the Sky Blue?: And Other Outdoor Questions
- Two Dozen Dinosaurs: My First Book of Dinosaur Facts, Mysteries, Games and Fun
- Linda Mullins
- Diana Ennen
- Darlene Arden
- Charles Meyer
- John De Visser
- Jose Maria Faerna
- Steve Young
- Donlyn Lyndon
- Winthrop Still Hudson
- Sharon Scott
- Jerold S. Auerbach
- Eric Enders
- Patrizia Diemling
- Randy Howe
- Atma Jo Ann Levitt
- Janice Sanford Beck
- Jimmy Bannos
- Jacqueline Sauliner
- Bob Ehrlich
- Paul Many