About 20 million Americans are practicing some form of Yoga. Yet the original purpose of Yoga as a path to inner freedom and enlightenment is embodied by only a few students in the West. Yoga Wisdom introduces this growing market to the endangered mental and spiritual disciplines of this ancient philosophy for living. From Yoga s origins and how it evolved into many schools, to the moral and esoteric principles that unite them all, here is the perfect primer on Yoga and its authentic practice.