Re: Which book should I buy!? (or all 3?) uNL
Don't buy Poker Blueprint. It's for 6max games.
I liked very much Easy Game, but Mason Malmuth said he doesn't recommend the book. I recommend it but since Mason Malmuth doesn't recommend it you should take my recommendation with a grain of salt.
Professional NLH is a must read. Another must read is NLH Theory and Practice by Sklansky and Miller.