This book is intended as an aid for those who wish to learn the advanced practices of Hatha Yoga from a qualified teacher. It is suggested that it also be used in conjunction with the Complete Illustrated Book of Yoga by Swami Vishnudevananda, the Sivananda Companion to Yoga and Yoga Mind and Body both by the Sivananda Yoga Vedanta Centre.
Many of the instructions given here have been purposely veiled by the original writers, others need elaboration, and many require the guidance of a teacher. Swami Vishnudevananda repeatedly stressed that these practices are not for beginners, and that to violate this caution is to put the psyche at risk. Please therefore, follow the instructions along with the guidance of your guru.