De Quindecim Stellis or the Book of Hermes on the Fifteen Fixed Stars, is the most important medieval and Renaissance source on the magic of the Behenian fixed stars which circulated in a number of different manuscript variants. Now for the first time, all four major variants of De Quindecim Stellis, Quadrapertitus, Tabula XV stellarum, Liber Enoch and Liber Thebit, with 7 variant sets of sigils, all appear in translation in one volume. Also included are major medieval and Renaissance sources reliant on De Quindecim Stellis including Marsilio Ficino and Cornelius Agrippa making this a truly comprehensive translation. The translator, Regulus Hess, is a researcher into the magic and lore of the Middle Ages and in addition to the excellent translations of De Quindecim Stellis, has provided a commentary, notes on the texts and extensive footnotes that give an extensive scholarly perspective. Also included is a commentary by Christopher Warnock who has been called "the father of the traditional astrological magic revival" and the "elder statesman" of astrological magic and has written and published many books on astrological magic and traditional astrology. Warnock provides a practical yet rigorous methodology, based on a spiritual worldview, that allows advanced contemporary practitioners of traditional astrological magic, like their medieval and Renaissance predecessors, to use the extensive information provided in De Quindecim Stellis to elect and create authentic and powerful fixed star talismans. Warnock also points the way to reconcile the variant versions of De Quindecim Stellis and to avoid arguments over the "best" translation. De Quindecim Stellis also includes eight, hitherto unpublished, fixed star sketches by the talented esoteric artist Nigel Jackson. De Quindecim Stellis, the Comprehensive Translations of the Book of Hermes on the Fifteen Fixed Stars, is an essential source for medieval/Renaissance astrological magic and a key text for contemporary astrological magicians.