The Blind Watchmaker: why the evidence of evolution reveals a universe without design

by Richard Dawkins

Reading this book was like being the choir that's getting preached to — but it did also deepen and enrich my personal understanding of the Darwinian model. It's been a long time since I read a book by Dawkins (I read most of — okay, okay, some of The Selfish Gene because he was coming to talk to all the nerds in the honors program when I was a college freshperson), and I forgot what a terrible writer he is. It's a shame, because he has some amazing things to say.

I'd only recommend this if you're a science geek like me. If you just want to tell off a creationist (or intelligent design-ist, which is a creationist in a sloppy disguise), there's lots of easier-to-read stuff out there.