B K S Iyengar is a living legend and is considered to be one of the foremost yoga teachers in the world. He has been practicing and teaching yoga for more than 60 years. He has written many books on yogic practice and philosophy, and is best known for his books Light on Yoga, Light on Pranayama and Light on the Yoga Sutras of Patanjali. Iyengar yoga centres are located throughout the world, and millions of students practice Iyengar Yoga. Co-authors are John J Evans, who has practised Iyengar yoga for over 20 years and has worked with B K S Iyengar on several of his books and Douglas Abrams, who is the co-author of a number of bestselling books with spiritual leaders, including Archbishop Desmond Tutu and Taoist Master Mantak Chia.