As far as fiction goes I really enjoyed "Tell No One" by Harlan Coben. I also really enjoyed "The Postman" I read it in High School in 1989 and I have read it twice since. The movie was not that good but I really enjoyed the book.
Don't know if it's the greatest I've read, but The Charm School by Nelson De Mille stands out quite considerably over the many hundred I've read. It's one book I have very fond memories of, very enjoyable.
Can't beat a bit of Vince Flynn either...I bet Mitch Rapp smokes El Rico Habanos in his sleep....5 at a time!