This book tells you specifically how to play the position after 1. e4 c5 2. Nf3 Nc6 3. Bb5. This is a very important chess position for those who like to employee the 3. Bb5 (+) line vs the Sicilian Defense. Thus if you play the 3. Bb5 lines this book is a "must buy" for any player rated 1600 or higher. If you are rated below 1600 then start with a more basic "starter" book.
I have used suggestions in this book and find that many positions occur which are somewhat of a surprise for many of my opponents. This is all to your benefit.
The analysis by GM Victor Bologan is excellent. I highly recommend this book for the serious 3. Bb5 (+) anti-Sicilian player.