Read every book you can get your hands on, both good and bad. The bad info will give you ideas on how to walk and talk like a real gambler with flawed knowledge.
Blackjack Bluebook II is my blackjack bible. I use the KISS III count explained by Fred Renzey-it gets the $$$. I also really like Burning The Tables in Las Vegas by Ian Andersen. More than once Ian Andersen makes it very clear how important penetration is to a card counter-this alone makes the book extremely valuable. Good cards!