The Sicilian Defense, by FM Thomas Wolski.
This module contains 41 challenges chosen from all of the important systems in the Sicilian Defense and is suitable for players of all levels. You will learn all of the basic opening principles for both White and Black and also come across many original ideas and novelties. Players with Elo ratings up to 1800 and perhaps even higher will benefit from this course module. Novices may have some difficulty with these challenges, but will gain a good introduction to the Sicilian and the main strategies for both Black and White.