The Dattātreyayogaśāstra

This book introduces, edits and translates the Dattā treyayogaśāstra , a Sanskrit text on yoga composed in about 1200 CE in South India. It teaches fo ur types of yoga practice but devotes the majority of its 193 verses to haṭhayoga , which it divides into two varieties, one which consists of the eight auxiliar ies first taught by Patañjali and one which has nine physical methods. It is thus the first text to combine the a ṣṭ ā ṅ ga system of Patañjali with physical techniques, and its teachings were highly influential on later authors and commentators of yoga texts.