Swami Muktibodhananda 

Swara yoga is an ancient science of pranic body rhythms and explores how prana can be controlled through the breath. Traditionally a closely guarded science, taught only through direct transmission from guru to disciple, very little has ever been written about it.
In this book the theory behind swara yoga is discussed, including the topics of prana, nadis and chakras. In the practice section the techniques of swara yoga are given in detail. The last section contains the original Sanskrit text of the Shiva Swarodaya with an English translation.
Swara Yoga is a suitable text for advanced yoga practitioners and yoga teachers. Line drawings, charts and illustrations are included.