Introduction, translation and notes by Esperança Valls i Pujol.

Translation and analysis divided into two parts: Jewish Astronomy at the Service of Peter III of Catalonia, the Ceremonious (1336-1387) and Jewish Astrology in the Middle Ages.

Through various manuscripts by different medieval authors, the researcher Esperança Valls i Pujol carries out a meticulous study from the beginnings of Jewish astronomy and astrology to its connection to Jewish historical figures which consolidated its importance in the Middle Ages.

Edited under the direction of Doctor Josep Ribera-Florit.