Among serious practioners Iyengar's book is recognized as the definative reference for the study of Pranayama - the Yogic Art of Breathing. Paperback (June 1995) Return to books. Light on Pranayama by BKS Iyengar B-016$19.95 p 802.660.9718 | f 802.658.9371 | info@yogavermont.com | One Mill St., Suite 236 | Burlington, VT 05401 Copyright © 2006, Yoga Vermont, Inc. All Rights Reserved.