The Taimanov Sicilian is one of the most flexible options for Black in the Open Sicilian.
Black avoids committing himself to a rigid set-up, and tailors his response once White has shown his hand. This can lead to a great variety of central structures, and the player with the better understanding of typical Sicilian themes will often emerge victorious - Taimanov positions need to be understood well in order to be played well.
Many of the post-war World Champions have used the Taimanov, and amongst the current world elite, Anand has played it most frequently.
This book covers the Paulsen set-up with ...Qc7 in addition to the "pure" Taimanov with ...Nge7.