The book is written for Black repertoire, most space (about 170 pages) is devoted to the main line 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.exd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7. The analyzes cover all White's possibilities in 3rd, 4th and 5th moves. The Gruenfeld Defence is well known to be one of Black’s best and most challenging responses to 1.d4, and has long been a favourite choice of elite players including Kasparov, Korchnoi, Svidler, Caruana, Vachier-Lagrave, Navara and others. Further information about the book is available at qualitychess.co.uk.