In this book Grandmaster James S. Benko, 9th Degree Black Belt and President and Founder of the International TaeKwon-Do Association, demonstrates the Hyungs (Patterns) required to advance in rank from 3rd Degree Black Belt To 4th Degree Black Belt in Tae Kwon Do: Yoo-Sin, Choi-Yong, and Yon-Ge. Also includes: What Are Hyungs?, Evolution of Tae Kwon Do Hyungs, With Which Hyung Does Each Rank Train?, How To Practice Tae Kwon Do Hyungs, Question and Response Sequences, Philosophy and The Trinity of Tae Kwon Do.