I guess we should call this topic an atheist book club.
If you are an open minded atheist you probably have dozens of good books that keep you interested enough to reread at least once. Here are a few of mine that I recommend.
The First American- a biography of Benjamin Franklin. Did you know that Franklin enumerated an impossible list of Virtues that he himself could not uphold but shows you how to live a virtuous life with out the worry of morals.
Death by Black Hole. by Neil deGrasse Tyson.
Gun, Germs and Steel- by Jared Diamond... Dude... it explains everything... not really but he takes a secular view for granted, so its enjoyable.
The God Delusion-Richard Dawkins. I haven't read it since I picked it up and only learned anecdotal evidence of rational view points I had already come to accept.
Hitch Hikers Guide to the Galaxy- Douglas Adams... Yup, Its in the right section.
The mote in Gods Eye- and the Gripping Hand- by Larry Niven and Jerry Pournelle. Interesting works of Sci-Fi
Leaves of Grass- crazy rantings of a man who knew which way was up and little else, who wrote some really profound shit. “DO I Contradict myself? Very Well I contradict myself... I am a measure of all things.”
What are the books that you reread? or really like.