This number of The Equinox series features Crowley"s records of his major magickal workings for the years 1909-1914, when he was at the height of his powers as a Major Adept of the A. A. and was initiated into the Sovereign Sanctuary of the Gnosis of Ordo Templi Orientis (O.T.O.). In addition to the "Vision and the Voice" Working, this volume includes details of a number of Crowley"s other magickal operations: the Paris Working (with Victor Neuberg), the Ab-ul-Diz Working, and the Bartzabel Working. This volume also includes a number of Crowley"s diary entries for the years 1909-1914.