When setting off for your yoga class, take a moment to think about Sir Paul Dukes, British journalist, author, and master of espionage and disguise. Credited for helping introduce yoga to the West with his books Yoga for the Western World (1958) and The Yoga of Health, Youth, and Joy: A Treatise on Hatha Yoga Adapted to the West (1960), Dukes's life story reads more like that of an action hero than a yoga guru.