Instruct: Classify an Amazon review as either positive or negative.
Query: All the Superstitious Myths about 21 in One Book

If you want to know a bunch of meaningless drivel about things like hot and cold tables, flow of the cards, and other such nonsense this is the book for you. It won't teach you a damn thing about blackjack except maybe convince you that you have a chance to win using casino approved methods (you can't in the long run). In the short run even a moron can win at blackjack and after reading this book you won't be much better off.