The Yoga Sutras of Patanjali Another translation of this classic text of Yoga. How To Be A Yogi by Swâmi Abhedânanda [1902] A road-map of the Yogic schools. The Yoga Sutras of Patanjali by Charles Johnston [1912] This concise work describes an early stage in the philosophy and practise of Yoga. Dating from about 150 B.C., the work shows dualist and Buddhist influences. Required reading if you are interested in Yoga or meditation. The Hatha Yoga Pradipika translated by Pancham Sinh [1914] The oldest extant work about Hatha Yoga, including the full Sanskrit text. Thirty Minor Upanishads by K. Narayanasvami Aiyar [1914] Thirty shorter Upanishads, principally dealing with Yogic thought and practice. Karma-Yoga by Swami Vivekananda [1921] Can work be holy? by Rishi Singh Gherwal [1930] Excerpts from the shorter Yoga Vasishta Kundalini: The Mother of the Universe by Rishi Singh Gherwal [1930] A source book on Kundalini; includes an English translation of the Lalita Sahasranama, the 'Thousand Names of the Goddess,' from the Brahmanda Purana. Great Systems of Yoga by Ernest Wood [1954] A review of the Yogic systems. Relax with Yoga by Arthur Liebers [1960] An introduction to modern Raja Yoga, with photos of asanas. Yogi Publication Society These are the Yogi Publication Society books specifically themed around Yoga, authored by William Atkinson under a variety of pseudonyms. There were many others published by the YPS, some of which can be found on the Esoteric Page. This is because they reflect Western Esoteric beliefs, rather than Hinduism, or Yogic knowledge. The Science of Breath by Yogi Ramacharaka (pseud. William Walker Atkinson) [1904] Yogic breathing exercises, a key to health and happiness. Raja Yoga by Yogi Ramacharaka (pseud. William Walker Atkinson) [1906] An early 20th century book on mental focus, repackaged as Raja Yoga. Yoga Lessons for Developing Spiritual Consciousness by A. P. Mukerji (pseud. William Walker Atkinson?) [1911] Learn the secret techniques of the Yogis to conquer fear, de-hypnotize yourself, and build character...