"This book reconstructs the tantalizing tale of Sri Sabhapati Swami (ca. 1828-1923/4), today a little-known swami who was originally from Tamil Nadu in southern India, and historically contextualizes a fascinating type of yoga that Sabhapati claimed would lead to an experience of being "like a tree universally spread." The practical method of having this experience, in technical terms called the samadhi or "composure" of sivarajayoga or the "Royal yoga for siva," was published in English and multiple Indic languages and lavishly illustrated in diagrams on subtle and physical bodies. This book is the first book-length treatment on Sabhapati Swami, scholarly or otherwise, and uses critically-edited sources printed in Tamil, Devanagari, and Bengali scripts to reveal the expansion of his literature across South Asia and globally, the vast majority of which has never before been considered in any scholarly work to date. The book shows how intertwined Sabhapati's yoga is with historical Tamil saiva and Siddha movements, including the mythos of the rishi Agastya, and also with Hathayoga and mantra-based ritual. It also takes into account his and his followers' wrestling with the Victorian scientific worldview and their rationalization of Hindu philosophical discourses in the colonial period. Finally, the book demonstrates the extent to which Sabhapati's teachings were integrated into esoteric religious movements such as the Theosophical Society, the Thelema of Aleister Crowley, and New Thought, and suggests that a reappraisal of scholarship on the roots of yoga in these movements is long overdue"--