Georg Feuerstein (27 May 1947 – 25 August 2012) was a German Indologist specializing in the philosophy and practice of Yoga. Feuerstein authored over 30 books on mysticism, Yoga, Tantra, and Hinduism. He translated, among other traditional texts, the Yoga Sutras of Patanjali and the Bhagavad Gita. Source: Wikipedia (en)