The Complete Idiot's Guide to String Theory by George Musser

We're living in the midst of a scientific revolution that's captured the general public's attention and imagination. The aim of this new revolution is to develop a "theory of everything"-a set of laws of physics that will explain all that can be explained, ranging from the tiniest subatomic particle to the universe as a whole. Here, readers will learn the ideas behind the theories, and their effects upon our world, our civilization, and ourselves.
The Complete Idiot's Guide String Theory explains how this exciting idea holds up against competing theories. In this Complete Idiot's Guide, you get:
• Clear explanation of quantum mechanics, Einstein's theories of relativity, and how string theory unites them.
• A quick, easy-to-understand overview of competing theories and how they might be tested.
• Fast facts about black holes, what's inside them, how they're made, and why they're so paradoxical.
• Simple, smart tips to help you visualize extra dimensions.