To quote Hamlet when asked what he was reading: "Words."
If I had to pick one favorite it would probably be John Steinbeck. The Grapes of Wrath, Of Mice and Men, and Cannery Row particularly.
I also love Hemmingway, Mark Twain, and Douglas Adams.
Science Fiction is my favorite genre. I don't know if he is in or out of favor at the moment, but I love Heinlein. Clarke, Niven, Pournelle, Asimov, Dick. Lots of SF writers.
I like poetry too. Tennyson especially. Langston Hughes was great.
Haven't had enough time to read for pleasure in a long time. Mostly been reading technical (programming related) books for the past number of years.