As with anything, I'd begin with some "classics" like this thread mentions. I don't think I've read too many "classics" in poker (if any!), so probably can't recommend them. I've read a lot of
poker books, but either somewhat advanced ones or books loosely related to poker.
Perhaps a good poker book I've read which may be useful for a beginner is Play Poker Like The Pros (Hellmuth) even though it is an older book; it keeps things fairly simple and that is great for beginning