I ran into Phil Torrone and Ladyada here at Maker Faire New York and they gave me an advance copy of their coloring book, E is for Electronics, an A-to-Z intro to electronics, from Andre-Marie Ampere to Clarence Zener (namesake of the Zener diode). The delightful illustrations are by Robert Ullman.
The book has been released under a Creative Commons license. Learn more about it here. E is for Electronics