Haha there are many of these types of books o.O Go to your local Barnes and Noble bookstore and you should find them in the "Philosophy" section, I believe. I personally recommend The End of Faith by Sam Harris and godless by Dan Barker. I've never read this one but my friend told me she found it very interesting (Irreligion). It's supposedly a book debunking religion with neato stuff. The author is a mathmetician... I'm not sure but I think there's math in the book o.O