Richter-Rauzer Sicilian for Black repertoire. Specifically, it is a variation whose diagram is on the cover of the book, which arises after the moves 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. 0- 0-0 Bd7. Most of the book deals with the basic lines after 9.f4 b5, but there are also discussed other possibilities of White in the 9th move, such as 9.f3. Compared to the First edition from 2014, this is revised and has nearly 100 pages more. Also the typesetting is much better. Both grandmasters have this variation in their main repertoire for a long time. They played it in tens, in the case of Kozul in much over a hundred games - and for this reason, the variation is sometimes called after him. Further information about the book and a sample are available at thinkerspublishing.com. Picture 2 shows contents of the book.