1,205 best tactical positions, grouped according to their topics. Intended for chess players with ELO 1600-2400. This chess exercise book is written by an experienced coach, International Grandmaster of ICCF. It contains more than 1400 exercises that are arranged very precisely after various combinational motifs. English, Spanish and Russian together. 305 pages. Soft color cover. Moscow, 2006.
These tactical puzzles are the basis of the computer program Ct-Art. If you like this sort of thing, you can buy an inexpensive program called Ct-ART for your android phone by Chess King that cost under ten bucks. A bargain and will give you many months (perhaps years) of study material . it just depends your preference for the written word vs interactive puzzles. I commend Blokh for selecting a very instructive set of problems.
This book was out of print for a while. I believe it is now available again.