The Fourth author's book on the King's Indian deals with with classical lines. After 1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 0-0 6.Be2 e5 are analyzed all possibilities of White except the Mar del Plata variation, which is covered in volumes 2 and 3. Namely, the author on almost 300 pages analyzes 7.dxe5, 7.d5, 7.Be3, 7.0-0 Nc6 (without 8.d5). The other ca 150 pages cover the Makogonov system 5.h3, or 5.Nf3 with 6.h3, the systems with 5.Be3 (Karpov, Larsen) and the Averbach System 5.Be2, 6.Bg5. Further information about the book is available at qualitychess.co.uk