Adiyogi: The Source of Yoga by Sadhguru Jaggi Vasudev - Non Fiction - Paperback
Shi-va' is 'that which is not', a primordial emptiness; Shiva is also the first-ever yogi, Adiyogi, the one who first perceived this emptiness. Adiyogi: The Source of Yoga. Author : Sadhguru Jaggi Vasudev & Arundhathi Subramaniam.