Author explains how to understand Pawn structures in three main variations of Sicilian Defence - Taimanov (1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6), Kan (4.Nxd4 a6) and Richter-Rauzer (1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5). Explanations, annotated games, exercises. Pictures 2 and 3 show content of the book. IM Herman Grooten is a chess coach with over 25 years of experience (Loek van Wely, Jan Werle), author of succesful books Attacking Chess for Club Players, Chess Strategy for Club Players and others. Further information about the book and a sample are available at thinkerspublishing.com.