a must read or listen
Anathem by Neal Stephenson: "Let's take a trip through time, space, and the history of human thought. The journey starts with the observations and suppositions of ancient philosophers, gains both credence and clarity through the development of the rules of logic, and eventually leads all the way to modern theories of everything, including the possible existence of not one but multiple universes and realities. That's the goal here and it succeeds better than any work of fiction with such ambitions has a right to."
(Via SF Site.)