Written by Swami Rajarshi Muni, it was originally published in Gujarati in December, 1972, and subsequently published in English in 1977. The first chapter discusses meditation before and after the release of Prana, while Chapter 2 deals with the time limit of Yoga practice. Chapter 3 deals with Yogic experiences. Chapter 4 discusses how Kundalini has to be experienced as it cannot be accurately described with mere words. Nevertheless, he goes on to describe his own personal experiences with the mysterious serpentine power and how his experiences completely bear out the the experiences of the great Yogis as ennunciated in ancient Yogic literature. The 5th chapter deals with various Yogic processes and the 6th and final chapter discusses Yoga Nidra (Yogic Sleep), its purpose, and its characteristics. This excellent account of his own experiences has been very helpful to many seekers and aspirants of Yoga.