B.K.S. Iyengar (born in 1918) is one of the world's leading teachers of yoga and the author of the bestselling yoga book of all time, Light on Yoga. He has taught cultural icons and world leaders as well as thousands of teachers who have taken his modernization and refinement of yoga to every corner of the world. His classic and bestselling books also include Light on Pranayama, Light on the Yoga Sutras of Patanjali and Yoga: The Path to Holistic Health. He was one of the first teachers to introduce yoga to the West, and there are now hundreds of centres around the world where Iyengar yoga is taught. B.K.S. Iyengar was named one of Time magazine's 100 Most Influential People in the world in 2004.