This book opens with a biographical account of Sabhapati, his editor Shrish Chandra Basu, and his students as gleaned from textual sources and the author's ethnographic field work. Sabhapati's literature in various languages is then analyzed, followed by a comprehensive exposition of his Śaiva cosmology and religious theories. Sabhapati's system of Śivarājayoga and its subtle physiology is then treated in detail, followed by an analysis of Sabhapati's aesthetic integration of aural sound and visual diagrams and an evaluation of the role of "science" in the swami's literature. Sabhapati also appealed to global authors and occultists outside of South Asia, so special attention is additionally given to his encounter with the founders of the Theosophical Society and the integration of his techniques into the thelemic "Magick" of Aleister Crowley, the German translation of Bavarian theosophical novelist Franz Hartmann, and the American publication of New Thought entrepreneur William Estep. To these are appended a never-before-translated Tamil hagiography of Sabhapati's life, a lexicon in table-form that compiles some archaic variants and Roman transliterations of technical terms used in his work, and a critically-edited passage on an innovative technique of Śivarājayoga that included visualizing the yogic central channel as a lithic "pole."