books.google.com - Vijnanabhairava is a very ancient book on Yoga. It studiously eschews mechanical worship, external rites and ceremonies and goes directly to the heart of the problem of the union of human consciousness with the Divine. There is no theoretical discussion in the book. It describes 112 types of yoga each...http://books.google.com/books/about/Vijnanabhairava_Or_Divine_Consciousness.html?id=2R2iSiMbuVwC&utm_source=gb-gplus-shareVijnanabhairava, Or Divine Consciousness