BJ Books

I'm looking to purchase a book on Blackjack and have scanned the various ones available on the Internet. Three stand out as far as I can distinguish and I am asking for recommendations on the three books. They are: Professional Blackjack by Wong, Basic BJ by Wong. and BJ Attack by Don S. Recommendations on additional BJ books are welcome. I play BJ once a week and am no novice. I am not a card counter but play a positive progression. I play Basic Strategy flawlessly but want to learn any other points or systems that may refine my play (including card counting). Thanks for any input.