The author lives and trains in California. Len has earned 5th Dan Black Belts in Tang Soo Do and Tae Kwon Do and 3rd Dan Black Belt in Soo Bahk. Len is married and is a father of three children and five grandchildren. Len has been training in organized martial arts since he joined his first Tae Kwon Do class after graduating college. Len began teaching martial arts after earning a Cho Dan (1st degree) Black Belt in Tae Kwon Do and Tang Soo Do styles of traditional Korean martial arts almost simultaneously. Len has been using aspects of martial arts in his own life for more than 20 years to bring order, understanding and self-awareness. Len augments his martial arts with Zen, strength-based weight training, boxing traing such as hand speed bag, heavy bag and long distance running. Meditation keeps Len’s body-mind in-tack, allowing him to train at higher levels of performance while minimizing injuries. Len has written and published magazine articles editorials and books extensively, writing and publishing more than 20 articles and editorials related to martial arts for several martial arts magazines including the prestigious Tae Kwon Do Times, MuDo Dojang and Black Belt Magazines. Many of Len’s articles illustrate the forgotten history and evolution of Korean martial arts. For this reason, Len’s articles are often republished around the world because of their excellent historical content, unavailable otherwise. Len’s articles also appear on many martial arts web sites around the world. Len has also published 20 books on Korean martial arts. These books include the traditional styles of Tang Soo Do, Soo Bahk and Tae Kwon Do. Len’s books and articles have been translated into many languages and one of his books for choosing a style for children earned the Good Housekeeping magazine’s Seal of Approval. Academically, Len has earned three A.A. degrees, two B.S. degrees in Physics, Mathematics, 2 Masters degrees in Education and Electrical Engineering and a Ph.D in Electrical Engineering. Len works professionally as a Physicist, Astrophysicist, Nuclear Physicist, a Mechanical Engineer, an Electrical Engineer and an Aerospace Engineer designing spacecraft and rockets for NASA and the U.S. Air Force.