First one I read was God is Not Great, but at the moment I am reading The Portable Atheist; it's compiled by Hitchens and incorporates the works of very prominent skeptics, critics, agnostics and so on dating back to the greek philosophers. Very interesting read and really great because of all the view points. I would recommend it. ^^
Haha I think it will. I have a very friend who's christian and he avoided me for like a week after he saw me reading that. I think my teacher disapproved of it too. Oh well. If people get to bring their bibles into class (and I don't even go to a catholic school) then I get to bring in whatever the hell I please.