Shlomo Sela is a lecturer in the Departments of Jewish Philosophy and Bible at Bar-Ilan University. His research focuses on Jewish attitudes toward the sciences, with special interest in the history of astrology in the Middle Ages. He has recently published: Abraham Ibn Ezra: The Book of Reasons, A Parallel Hebrew-English Critical Edition of the Two Versions of the Text, Edited, translated, and annotated by Shlomo Sela, Leiden: Brill Academic Publishers, 2007. With this volume he begins the publication of Ibn Ezra’s complete works on astrology.