The Najdorf Sicilian 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5. This is not a repertoire book, the author discusses the possibilities for both colors. In this first volume, the most space, over 100 pages, is devoted to the line 6..e6 7.f4 Be7 8.Qf3 Qc7 9.0-0-0 Nbd7 (The Three Piece System), discussed in Chapter 2. Chapter 3 discusses Gelfand's variant 6..e6 7.f4 Nbd7. Chapter 1 deals with the less common continuations in the 7th move (after 6..e6) of both White and Black. The fourth chapter contains 176 exercises and their solutions. Picture 2 shows contents of the book. Lukasz Jarmula, born 1998, is Polish GM, his peak rating was 2512. Further information about the book and a sample are available at thinkerspublishing.com