This may be the best opening book ever written. If you play the King's Indian, no, if you play 1.d4 Nf6, then you absolutely must buy this book. Packed with original and computer-checked analysis, this is a must-read. Dembo explains positional concepts with flair, explaining the logic behind almost every move. Dembo examines all of white's tries and describes how to make a complex, interesting struggle out of all of them, including the most boring systems. My favorite chapter is the one on the Trompowsky. Dembo recommends 1.d4 Nf6 2.Bg5 c5! with the aim of exploiting white's dark square weaknesses after the bishop is traded off. After reading, it seems like practically a refutation of the Trompowsky! I showed Dembo's ideas to my coach, who is an IM approaching his last GM norm, and he couldn't dent Dembo's line. Though thinner than Palliser's Fighting the Anti-Sicilians, in my opinion it is a better book, as Fighting the Anti-Sicilians is just reams and reams of analysis. This book + Gallagher's Starting Out: The King's Indian Defense = a full repertoire against 1.d4. Overall, a fantastic read.