The Book of the Nine Judges

"The Book of the Nine Judges" is a famous medieval compendium of traditional horary astrology, compiled from Abu Ma'shar, Masha'allah, Sahl bin Bishr, 'Umar al-Tabari, al-Kindi, Abu Ali al-Khayyat, Dorotheus, Aristotle, and Jirjis. It is the largest known compendium of these sources on answering horary questions, and in many cases is the first modern translation of these Latin/Arabic authors.