Reading up online about ashtanga yoga, I came across a mention of Indra Devi, who was one of three influential yoga teachers who studied with Krishnamacharya (Pattabhi Jois and Iyengar being the other two). I was intrigued about her as she was born in pre-communist Latvia and spent many years in India; then she was the first person to make yoga fashionable to the U.S., teaching movie stars and other famous people in Hollywood. She moved to Argentina in the 1980s until her death in 2002 (she was 102 years old, hardcore yogis live long lives).

This book was written during her time in the U.S., and the copy I got from the library is a printing from 1969 with plugs written by Ruth St. Denis and Gloria Swanson on the cover. Certain aspects of the book are essentially timeless, some incredibly dated. The most interesting parts were about the healing nature of yoga, specifically how it moderates the endocrine glands.

Not the most definitive or lasting text on yoga, but interesting nonetheless.