Life of the Cosmos, by Lee Smolin
"I'm currently working on a universe simulation game and have been reading a lot on recent discoveries about our galaxy, stellar processes, and astrophysics. Most science books are camouflaged in technical jargon - they sound deadly boring and dry - but Smolin comes across more like Richard Dawkins or Carl Sagan, and he makes it all interesting in much the same way that we'll need to in the game."