This is a great book, but a word of warning, this is an advanced book. You have to put in a lot of time and effort to get something out of this book. Kotov's book is specific for strong players who have the skill, & want to improve their abilities to calculate accurately. Though he talks about candidate moves, he never answers how to find them. The problem is that it will take an average player lot of time to find the canditate, if he is able to figure the position out. I am never able to find more than 3-4 lines on my own when the author gives 8-10 different lines each analyzed 8-10 moves or further deep. I recommend this book to anyone 2200+. good luck.