The beginning, middle, and end of yoga texts is the Yoga Darshan (Yoga Sutras) of Patanjali. It stands alone as the sole authority on yoga outside the Upanishads and Bhagavad Gita.
At the Atma Jyoti Blog, Swami Nirmalananda Giri has begun a commentary on Patanjali's Yoga Sutras. This commentary is based not only on his own experience and studies, but on the writings of Vyasa and Shankara, perhaps the most qualified writers on this subject. I. K. Taimni, author of the Science of Yoga, is also a
