$12
Light on Yoga by B.K.S. Iyengar. Gently used paperback copy from a 200-HR Yoga Teacher Training.
"The definitive guide to the philosophy and practice of Yoga--the ancient healing discipline for body and mind--by its greatest living teacher. Light on Yoga provides complete descriptions and illustrations of all the positions and breathing exercises. Features a foreword by Yehudi Menuhin. Illustrations throughout."