Source of Supreme Bliss contains the first English translations of important commentaries on the Highest Yoga Tantra system of the Heruka Chakrasamvara Five Deity practice. Included is a lucid, practical, and deeply profound explanation of the generation stage by Ngulchu Dharmabhadra. This is followed by an extremely rare and profound commentary by the First Panchen Lama Losang Chokyi Gyaltsen on the completion stage. Also included is a commentary on how to perform a proper retreat of Chakrasamvara. The latter half of the book comprises translations of the ritual texts associated with the commentaries. Everything needed to engage in the practice of Heruka Five Deity is included within the pages of this book, which will be indispensable for anyone who undertakes this practice and will provide rich and profound insights for those interested in Highest Yoga Tantra in general. Line drawings provided by Andy Weber.