The Yoga Tattwa Upanishad, an ancient treatise on early yogic practices leading to higher meditation, is one of twenty Yoga Upanishads. There is no known commentary on it and there has been no published English translation for over 100 years. There are 142 verses translated from Sanskrit into English. A separate translation of each word or short phrase is also given. Many important topics are dealt with, such as mantra yoga, laya yoga, hatha yoga, raja yoga, which include the philosophy, systems and practices of yoga. The text also discusses the five tattwas, or elements of creation: earth, water, fire, air and ether, and provides detailed instructions on how to meditate upon and realise these elements and their associated powers. Swami Satyadharma, a world-renowned teacher of yogic meditation and allied philosophies, has also written the commentary on the Yoga Chudamani Upanishad, available on Amazon. Born in Connecticut USA, she lived in India for over 30 years imbibing the traditional yogic teachings, and becoming Director of the Department of Undergraduate Studies at Bihar Yoga Bharati. Ruth Perini (Srimukti) is a Sanskrit scholar, linguist and yoga teacher.