This book has a lot of great information for beginning and intermediate players. I'm a self-taught aspiring player, and while I was capable of actually hitting the ball with english, I didnt quite understand what this would do in all cases. Ray Martin's book focuses heavily on the implications of english and, in fact, gives easy geometrical formulas you can use to make bank and carom shots. (I needed those!) Three minor problems I have with the book, though: 1) It's tough to differentiate black target balls from other gray balls. They all look black. 2) The wording gets repetitive at times - it seems every shot is come across "thousands of times." Then again, if each of these 99 shots is "critical," there are only so many ways to say so. 3) Finally, a lot of the shots focus on straight pool. If all you play is 8-ball and 9-ball, the last 20 or so shots are of limited value. (Most are positions for putting a ball in and breaking the rack in the same shot.) Of course, if all you play is straight pool, this is great. Anyway, I highly recommend this book. These problems I have with it are nothing significant, and the information contained within is priceless to someone who can hold his own but is trying to become great.