Book Title: Taekwondo Black Belt Poomsae: Original Koryo and Koryo Authors: Richard Chun and Doug Cook Taekwondo Style: WTF Taekwondo ASIN: B00GSCKT6O Amazon: Summary Recommendation: If you're looking to complete your taekwondo library, this is a good book to add to your collection. Not only does it provide a guide to performing Original Koryo, it contains a very well-written history of taekwondo.