Didn't know about this until today.
Mrs Fry - Stephen Fry wrote as his wife and talked about Fry in a different way. Funny.
Hijacker's guide to the galaxy - very funny series. Like it a lot for the imagination of Douglas Adams.
Pyramids - Like it a lot. Talks about religion and human nature in a very peculiar way.
God is not Great is funny because I agreed with Christopher Hitchens so much when it comes to religions.