Light on Yoga is a good no-nonsense reference: https://www.amazon.com/Light-Yoga-Classic-Worlds-Foremost/dp/8172235011/ref=sr_1_3?s=books&ie=UTF8&qid=148011973

Light on Yoga is a good no-nonsense reference: https://www.amazon.com/Light-Yoga-Classic-Worlds-Foremost/dp/8172235011/ref=sr_1_3?s=books&ie=UTF8&qid=1480119735&sr=1-3&keywords=light+on+yoga https://www.amazon.com/Light-Yoga-Classic-Worlds-Foremost/dp...