This book is fantastic. I never put it down the whole time I was training and it got me through to my black belt. I am now looking for the equivalent reference book for WTF black belts. I recommend this book to anyone who is serious about studying the sport. The illustrations of the poomses are excellent and I especially like the pictures at the back of the book that show the directions for the Taeguks. The section on sparring is also very good. It clearly details the types of offensive and defensive moves and explains how these moves work. Great reference tool to support your training.