Byrne's pool books & videos have set (and raised) the industry standards for many years now. As a professional pool instructor, I read everything I can, and have strong opinions about what's actually worthwhile, correct, and genuinely helpful. Byrne's new book has moved to the TOP of my list of books I recommend to my students, from a playing perspective (this is not a science book). I don't care who you are, you don't know all the stuff in this book. And if you're at a level where you know a good percentage of what's in this book, you're also at a level where learning even one useful new thing is worth the price of the book. If you've been playing for a while, this book will open your eyes to a lot of new possibilities and understanding. If you're in your first year or two, you might do better by first focusing on fundamentals of form (find a good instructor) and getting a grasp of how balls behave and why (look for Byrne's videos - Volumes 1 & 2). You don't know what you don't know. Now, with this book, those who have read it will know many things you don't.