Margolies authored over 55 books on Jewish topics. He possessed a
photographic memory, and was well versed in all aspects of both the written
Bible,
Oral Torah (
Talmud and its commentaries) and
Kabbalah (
Zohar etc.). He established the Rambam library. He wrote on a wide range of subjects, including on the Kabbalah. He was also involved in a controversy with
Gershon Scholem over the
Jacob Emden/ Jonathan Eybeshuetz controversy. He wrote a number of scholarly biographies of major Jewish personalities such as
Maharsha,
Ohr Ha-Chaim Hakodosh,
Moses ben Nachman (Ramban), and
Yechiel of Paris. == Awards ==