Swami Sivananda Saraswati is the author of over 200 books on yoga, Vedanta and other topics and spent a lifetime teaching yoga through his Sivananda Yoga Vedanta Centres. He was a doctor in Malaysia before renouncing his work to becoming a monk. Sivananda Saraswati spent his life doing intense sadhana, learning the scriptures and teaching yoga. Calling his yoga as the Yoga of Synthesis, Sivananda Saraswati combined karma yoga, jnana yoga, bhakti yoga and raja yoga and spread it across the world.