"In the west, where supplication to gurus is not the cultural norm, he elicits such a response from a cadre of longtime yoga practitioners. They credit him with changing their lives — and the face of yoga in the United States. In 1966, he published a landmark book explaining 216 yoga postures called "Light on Yoga" which has sold nearly 3 million copies and has been translated into 17 languages. His technique was physically challenging, unusual for Americans practicing yoga, but what truly set it apart was his therapeutic approach to the poses. He devised specific prescriptions, or sequences of poses, to help people with ailments such as backache, headaches, high blood pressure, diabetes and many more."