777 Revised, A Reprint of 777 with Much Additional Matter (often titled 777 and Other Qabalistic Writings of Aleister Crowley) is a comprehensive reference work compiled by Aleister Crowley, designed as a "magical and philosophical dictionary" to unify various mystical and religious systems. It is a foundational text in Western occultism, providing a structured system of correspondences for practical magic based on the Hermetic Order of the Golden Dawn and Qabalah. The book is structured to help practitioners organize their knowledge and understand the "common denominator" between disparate religious systems.