This book is a pocket-sized translation of the Nan Jing. Written in the late Han Dynasty, the Nan Jing is one of the four foundation classics of Chinese medicine. Its full title in Chinese is the Huang Di Ba Shi Yi Nan Jing (The Yellow Emperors Eighty-one Difficulties Classic). It is called the Eighty-one Difficulties because it consists of 81 chapters, each chapter discussing a difficult, unresolved or unclear issue from the Huang Di Nei Jing (Yellow Emperors Inner Classic). This is the book that systematized pulse diagnosis at the radial arteries on the wrists and that also systematized the use of the 60 transport points in five phase acupuncture. As such, this is a must-read and must-own text for all acupuncturists and serious practitioners of Chinese medicine.