Interesting (Non software) books?
roundsquare: God's Debris.  Available in pdf here:http://www.andrewsmcmeel.com/godsdebris/Its written by Scott Adams, the guy who does Dilbert, but its completely different from Dilbert.  Its basically an exploration of one theory about where the universe comes from, the nature of god, etc...  A thought experiment in conversation form, if you will.I like it because it brings up some neat ideas that may not be obvious.Side Note: He gets some of the science wrong in the book, so if you do read it, make sure you fact check any science before you believe it.