For the first time in English, this classic Italian text collects the rites, practices, and esoteric knowledge of the powerful and mysterious UR Group for the use of aspiring mages. Included here are instructions for creating an etheric double, speaking words of power, and interacting with entities, as well as translations of such arcane texts as the Tibetan Thunderbolt Diamond Path, the Mithraic cult's "Grand Papyrus of Paris," and the Greco-Egyptian De Mysteriis.