satyananda saraswati (25 december 1923 – 5 december 2009), was a sannyasin, yoga teacher and guru in both his native india and the west. he was a student of sivananda saraswati, the founder of the divine life society, and founded the bihar school of yoga in 1964. he wrote over 80 books, including his popular 1969 manual asana pranayama mudra bandha.