Book excerpt: When Bill Moyers visited China to explore the mysteries, and the healing potential, of Chinese medicine for his acclaimed PBS series "Healing and the Mind," he sought out David Eisenberg as his guide. For every reader fascinated by the seemingly fantastical aspects of Chinese medicine, from acupuncture addiction to Qi Gong martial arts, this captivating book offers deeper and more detailed encounters with the physicians and patients, the mystics and the martial artists, who were featured on television. Here is a sympathetic, yet objective appraisal of the concept of Qi (chee), the vital energy which is the unifying principle of Chinese medicine. Here are Chinese sages from the Yellow Emperor of 2700 B.C. to the very modern Dr. Fang, who remarks, "Acupuncture without Qi is only as effective as one man's sticking needles in another." And here are Chinese people from all walks of life as they seek relief, through a rebalancing of their Qi, their vital energy, for ailments from colds to cancer.