My son is an 11 yr old travel baseball player. While fundamentally sound, recovery from a mistake, a bad at-bat, individual focus and concentration have always been challenging. This comprehensive, insightful book on the mental aspect of performance is simply amazing -- I couldn't put it down. Immediately after reading I began implementing the mental tips provided in this book. The results were instantaneous! His concentration, visualization, focus and relaxation improvements translated directly into improved performance. Batting avg sored and pitching performance increased dramatically. Through visualization of proper techniques, written goals and the ability to relax, he was 2nd on the team in BA during 2001 USSSA world series w/ .483 avg and was winning pitcher in the championship game against Puerto Rico. Without the techniques in this book, I have no doubt his performance would not have been as successful. I take the book with me every where to use as a reference -- pages are highlighted and becoming frayed. Make no mistake....if you have an established player looking to improve, buy this book before any other. In my opinion, this book will benefit even the most advanced player!