Written by John Gribbin, "In Search of Schrodinger's Cat" is the best introduction to quantum physics that I've run across. It starts with a couple chapters on classical physics and a little bit of history to give the reader a foundation to base the rest of the book on. All of the concepts are explained in easy to understand terms with all of the unproven or speculative theories presented as such. The concepts of Heisenberg's Uncertainty Principal and dual states of reality are covered very thoroughly. Also covered are antimatter,time travel, the interaction of virtual particles and the wave/particle duality of matter. This is a great book for the arm-chair scientist or anyone who wants to catch up on the topics often left out of high school physics classes.