A book about one of the greatest Tibetan historical figures, spiritual authority, teacher-master, visionary, the seventeenth Gyalwa Karampa (which means that he is the latest in a series of reincarnations of that spiritual lineage conceived in 1100).
"Yoga Upanishads: The Secret of Harnessing - Collection, Volume I" is a collection of texts dealing with the philosophy of yoga and its spiritual practices.