Mysteria Magica: Fundamental Techniques of High Magick by Melita Denning
The magical order of the Aurum Solis is best known through the writings of Osborne Phillips and the late Melita Denning. Long out of print, Mysteria Magica was the third volume in The Magical Philosophy series, a complete curriculum of development within the Western Mystery Tradition. Mysteria Magica is the classic ritual text appearing on countless suggested reading lists.