By Hee Il Cho. #532. 7 X 10, 208 pages, paperback. ISBN #0-86568-056-6. After years of preparation, Tae Kwon Do Master Cho presents a comprehensive three-volume series containing the original 20 traditional recognized forms, as well as the philosophy behind each. Beginning with Chonji and continuing through Ton il, this is a must have reference set for any Korean style martial artist. Well illustrated with hundreds of black & white photos.