This is a nice book for a club player who is frustrated on meeting various responses from white after 1.e4 c5. As this book solely recommends a sicilian variation (four knights/classical sicilian), French-defence or Caro-kann players may be dissapointed with the material inside. However, sicilian players will rejoice to find a complete repertoire against sicilian c3, morra gambit, closed sicilian, grand-prix attack, etc.
All the variations are solid and theory approved, which is a good and a bad thing, for example 1.e4 c5 2.c3 Nf6 3.e5 Nd5 against sicilian c3. The bad thing is that veteran 1.e4 players may be familiar with this repertoire. However, the author has put latest theory update on these variations and I find them very interesting.
Plus side: Solid repetoire, an honest evaluation of positions
Negative side: Familiar lines (less surprise value)