Joined: May '08
Age: 58 (M)
There are to many different aspects in poker, so i don't think there is a "best book" in existence. What part of your game do you want to improve? Cash, SnGs MTTs? Holdem or other forms of poker? Harrington has written a bunch of books. They can keep you occupied for a while. Super System II is a good foundation. If you are about to play hi/lo games, look for the books by Ray Zee.
Joined: Aug '08
Age: 49 (M)
you dont need to buy a book, theres plenty of information on strategys and do"s and donts online, you just need to find the right style of play that suits you, your bankroll and your prefered game, be it sngs, cash or mtt.