Amarillo Slim - This is his autobiography, it is probably they best book about gambling you will ever read. While the book is focused on Slim's actual life he does teach you a few great hustles and lessons throughout the book. He is the greatest gambler to ever live, read the book and you will understand.

 Hold'em for Advanced Players - One of best books on poker, everytime I go through a dry spell in cards I pull out this book to put me in the right mind set. The ideas are simple to understand and can be used both tight and loose games.