This book is the most comprehensive text ever published on yoga. It contains a complete course of 36 structured lessons on all the practices of integral yoga. The lessons were compiled from the teachings given by Swami Satyananda Saraswati and are useful as a practical and theoratical guide for all levels of yoga teachers and aspirants. This book presents a synthesis of yoga in a scientific and systematic manner. The different branches of hatha yoga, raja yoga, mantra yoga, karma yoga, bhakti yoga, jnana yoga and kriya yoga ar progressively introduced with special emphasis on practice, theory and application in daily life.