Siddha Mahayoga and Shakttipata (energy pass) are inextricable. Without energy pass, there is no Mahayoga. This book discusses the role of energy pass in Mahayoga and there is a cause and effect relationship between shakttipata vidya and siddha mahayoga. Among the many ways for attainment of siddha mahayoga or spontaneous establishment of oneself into one's nature, shakttipata vidya is a principal as well as foolproof method. Seeing that there is a scarcity of books written on this subject, this book has been brought out by Mahayogi Siddhababa to fill that gap and to help out sadhakas or spiritual practitioners.