Frank, I'm glad we got you back. Thanks Dan for getting the "fix" in. (Wow, first time I ever publicly thanked someone for getting a fix in.)
Frank, this question isn't necessarily related to your book, but here goes: at best, what will the ability to count cards do for you when you play blackjack? If you master card counting how much can it help you given multi-deck shoes or even playing a double-deck game?