There are two Sicilian lines where White plays an early P-KB4; 1 P-K4 P-QB4 2 P-KB4 which is probably inferior to the system popularised by the Dutch player Vinken - 1 P-K4 P-QB4 2 N-QB3 and 3 P-KB4. This latter system occupies most  of this book. The author demonstrates the Vinken System to be a viable alternative for White in which the first player strives for a King-side attack which can so easily come off.