Both Stephen R. Donaldson and P. D. Ouspensky are known for esotericism?
P. D. Ouspensky Pyotr Demianovich Ouspenskii (known in English as Peter D. Ouspensky, Пётр Демья́нович Успе́нский; 5 March 1878 – 2 October 1947), was a Russian mathematician and esotericist known for his expositions of the early work of the Greek-Armenian teacher of esoteric doctrine George Gurdjieff, whom he met in Moscow in 1915. He was associated with the ideas and practices originating with Gurdjieff from then on. He shared the (Gurdjieff) "system" for 25 years in England and the United States, having separated from Gurdjieff in 1924 personally, for reasons he explains in the last chapter of his book "In Search of the Miraculous".
Society for the Academic Study of Magic The Society for the Academic Study of Magic (SASM) is a multidisciplinary academic group composed of those scholars studying all aspects of magic and other aspects of esotericism. According to the Society's website, the scope of the Society's interests include "the history, sociology, philosophy, psychology, anthropology of magic, magical practices and theories of magic, as well as magical objects, artefacts and texts."