Books
- To Go to the Moon : Comparisons of the Soviet and American Lunar Quest (Springer Praxis Books / Space Exploration)
- Understanding the Universe : An Introduction to Physics and Astrophysics
- The Universe and How to See It: A Practical Guide to Viewing and Understanding the Night Sky
- The Backyard Stargazer: An Absolute Beginner's Guide to Skywatching With and Without a Telescope
- Dinosaurs and Creation: Questions and Answers
Books