Rabbi Shimon ben Zemach Duran (1361-1444) was a colorful rabbinic
authority in Algiers. In his book, Zohar Harakia, on methods of
enumerating the 613 commandments, he summarizes the work of previous
authorities on this subject, especially Maimonides and Nachmanides. He
also presents his own system of enumeration. Thus, his work is a compact
introduction to this fundamental subject. The text, first printed in
1515, is written clearly and arranged as a commentary on ibn Gabirol's
poetic version of the 613 commandments, which is chanted on Shavuot.
This English translation and notes make it accessible to lay readers as
well as students of Jewish law, liturgy, and medieval Jewish history.