In Search of the Miraculous: Fragments of an Unknown Teaching
by Peter D. Ouspensky (Pyotr Demianovich Ouspenskii)
Ouspensky studied the Gurdjieff system directly under Gurdjieff’s own supervision for a period of ten years (from 1915 to 1924). His book “In Search of the Miraculous” is a recounting of what he learned from Gurdjieff during those years.