Here is a short list of his books:
The Book Of Chocolate
Abracadabra: The Story Of Magic Through The Ages
The Book Of Blood
Here There Be Monsters
This Will Kill You: A Guide to the Ways in Which We Go
The Way They Play Series
The Human Body: Invention & Impact
The Brain Makers
Legends Of Rock Guitar
Music & Technology
For Boys Only Yahoo!
The Ultimate Desk Reference
Space: The Next Business Frontier
The National GUITAR Museum.
Newquist's writing on Artificial Intelligence can be found by clicking the image of the mechanical brain.