Books valued by professional players (attn stalker?)

It is often been said that Blackjack Attack has no value for professional players, a point that I agree with to a certain extent. I believe it's most valuable for card counters that are high green/low black and below. Beyond Counting has been praised greatly by stalker and other professional players. If BJA has no value, I suspect that Professional Blackjack, The Theory of Blackjack and others, probably don't have any value as well. Therefore, besides Beyond Counting, what are the "good books" for professional players? Stalker? Anyone? I would really appreciate some input. Thanks