Oooh, another one that’s well worth a read is Richard Dawkin’s The Selfish Gene.

I think Dawkins is a bit of a dick, and his brand of combative atheism is unpleasant at best, and probably counterproductive. But he is (or was) an amazing writer on evolutionary biology, and that book’s the best explanation of how evolution works that I’ve read. (Also, it’s NOT about selfishness at the human scale, the world is used metaphorically, and there is even a chapter or two explaining how altruism could have developed).

His book The Blind Watchmaker is also good for it’s exploration of abiogenesis, though it’s a bit later and it has a bit of the anti-religious arrogance of some of his newer approach.

These aren’t really about atheism, but more providing an alternative world view that undermines the obviousness of creationism.