Secrets of Planetary Ritual is the first English translation of the authentic planetary invocations of the Harranian Sabians from the most famous of astrological grimoires, the Picatrix. It contains full instructions for the ritual conjuration of the seven planets. Translated by John Michael Greer and Christopher Warnock from Pingree's Latin critical edition it also contains the Arabic spirit names from the Ritter & Plessner's German translation of Picatrix. Authentic and magically potent, Secrets of Planetary Ritual provides the perfect ceremonial invocations for the creation of planetary talismans.