Need a book on simple, effective robotics? This is the one! Written by Solarbotics' founder Dave Hrynkiw with contributions by Mark Tilden
Simply, the best introductory book into electronics you can buy. Inexpensive, detailed, and easy-to read. Get it! Get it now, now, now!
Absolute Beginners Guide to Building Robots By Gareth Branwyn. Get the parts for the project robots too!
Intermediate Robot Building by David Cook covers all aspects of robot building, from mechanical, to electronics, to microcontroller selection