Small enough to be conveniently carried in a yoga-mat bag, this book provides a concise philosophical introduction to the fantastically, enormously, mind bogglingly diverse set of practices we refer to as yoga - focusing on many kinds of hatha yoga practiced today and their origins. Intended for beginning students, advanced students who do not have time to read a lot of yoga books and yoga teachers who want accessible answers to their student's questions, it is organized around questions frequently asked by beginners. At the end of each topic, additional questions spark further interest and self-reflection.