This is a not too technical book, introducing you to evolutionary robotics. It covers a lot of interesting work done in the field over the last few years.
Using genetic algorithms it is possible to construct the brain of a robot ( Neural network ), and even (though harder) the hardware itself. The book gives an introduction to genetic algortihms & artificial neural networks, but the reader should still be somewhat familiar with these concepts before buying this book.
After reading this book, I did one of the experiments mentioned in the book. While I only did this with a freeware Kephara robot simulator, it was still fun.