Code: The Hidden Language of Computer Hardware and Software

I first heard of Charles Petzold's Code: The Hidden Language of Computer Hardware and Software [amazon link] from DNR.

My copy arrived in the mail yesterday, and I've had a chance to read a few different sections. So far, I'm impressed by Charles' description of the logic hardware that is used to build a binary adder, as well as his description of ones-compliment and twos-compliment (a topic that is often hard to describe to someone). I can't wait to read more!