What Mark Singleton does prove, with massive, irrefutable, fascinating and often hilarious evidence, is that yoga is a rich, multi-cultural, constantly changing inter-disciplinary construction, far from the pure line that its adherents often claim for it. Wendy Doniger, Times Literary Supplement This book, an invaluable source on modern yoga, should be on the reading list of every serious student and teacher training program. Richard Rosen, Yoga Journal