Awfully tough to say, but if I really had to pick one...i mean, really really had to. Say, if you hold me at gun point or something, and not just, if I knew, I mean really knew for sure that you could pull the damn trigger, I would then maybe say, The Catcher In The Rye By J.D. Salinger. My only problem with the book though is, I see myself a bit too much in it. Its almost creepy.
It's a brilliant book. I love books where the author isn't trying so hard to be so damn creative. I hate that phony stuff. After The Catcher' i'll be going with just about any Stephen King book. That guy knows how to write stuff that's so bereft of phoniness.
Hate to have to choose, but last book I've read is usually current favorite. I guess I'd have to say it would be one I'd like to re-read many times over. Current favorite is "Water For Elephants" but would always go back to one of the mystery writes, like Anne Perry, or Robert Parker - love his series set in the Southwestern U.S....also very fond of C.S. Lewis, though.
The Complete Works of Shakespear are a good read and even better for reaching the baked beans on the top shelf in my kitchen. Always but Lear at the bottom of the pile as it is the weightiest and Midsummers Night Dream at the top as it is guarenteed to put a spring in your heel.