I just completed God is not Great by Christopher Hitchens. I am beginning to lean towards philosophy in university, and theology is particularly interesting to me. So I picked up Hitchens book on the recommendation of my dear mammy.
I went into the book a doubtful deist of some sort, and have finished it with a firm atheism. Hitchens' book differs from Dawkins in that he argues not simply that religion is man-made, but that it is also evil and no religion is innocent. A very good book indeed. Hitchens is very snarky, though admittedly it's a tough subject not to be snarky about, especially since his main point is that no religion deserves respect, a view I have come to agree with.
Next up on the list I'm going to read In the Shadow of the Sword:The Birth of Islam and the Rise of Arab Global Empire by Tom Holland, C.S. Lewis' Mere Christianity and Bertrand Russell's Why I am not a Christian.