Infernal Geometry and the Left-Hand PathA comprehensive guide to the history and practice of Angular Magic. Details the development of the magical system of the Nine Angles by the Church of Satan and the Temple of Set, as well as its internal body, the Order of the Trapezoid. Analyses the three key rites of Angular Magic: Die Elektrischen Vorspiele, the Ceremony of the Nine Angles, and the Call to Cthulhu. Explores historical influences on Angular Magic, including Pythagorean number