The Forty Chapters of al-Kindi
The famous, “first” Arab philosopher, al-Kindi (ca. 801-870 AD) wrote many instructional letters and works on astrology and the universe. The Forty Chapters is on horary and electional astrology: answering questions and choosing auspicious times to act. It is the second volume in the horary trilogy, preceded by The Search of the Heart and followed by The Book of the Nine Judges.