From the back cover:

This was the first book published on the line of play in the Sicilian 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 e5 5 Nb5 d6, which the author has appropriately labeled the Neo-Sveshnikov. 

Black’s 6^th move has only been employed as part of a system in the last seven years. International Master Jeremy Silman played the line in major tournaments for over a year before beginning this analysis. He developed an understanding and feel for the system which permits him to relate the underlying concepts to the reader. 

Silman has provided an in-depth study of the variation and includes some by play to aid readers in lines branching from the main theme.