First published in 1919, the legendary Blue Equinox was the original fountainhead of the worldwide Ordo Templi Orientis (O.T.O.), providing a course of study available to all. It will prove to be of general interest to any serious student of western occultism, both for its esoteric insights, and its look inside the intent, structure, and curriculum of a magical society. This first paper edition makes an affordable introduction to this work.