Finally, an expert has put all the pieces of the negative double puzzle into a single, comprehensive, comprehensible book. If you play bridge competitively, you and your favorite partners need this book. Any two bridge players will have at least four opinions about any bidding sequence involving a negative double. Thus, you and your partner probably miss each other more often than not after an opponent overcalls your side's opening bid. Bergen explains clearly and comprehensively how you and your partner can change that.