In Search of the Miraculous: Fragments of an Unknown Teaching is a 1949 book by Russian philosopher P. D. Ouspensky which recounts his meeting and subsequent association with George Gurdjieff. It is widely regarded as the most comprehensive account of Gurdjieff's system of thought ever published.

Ouspensky describes Gurdjieff's teachings in fascinating and accessible detail, providing what has proven to be a stellar introduction to the universal view of both student and teacher. It goes without saying that In Search of the Miraculous has inspired great thinkers and writers of ensuing spiritual movements, including Marianne Williamson, the highly acclaimed author of A Return to Love and Illuminata.

This historic and influential work is considered by many to be a primer of mystical thought as expressed through the Work, a combination of Eastern philosophies that had for centuries been passed on orally from teacher to student.