A. He wrote a basic, yet brilliant, clear and explanatory commentary on all of the 24 books of the Jewish Bible, as well as almost the entire Talmud. (This by the way before word-processors or even the ball-point pen). His terse and careful wording is simple for the beginner and includes so much thought for even the advanced scholar. His writings kept these important and sacred texts open books for further generations of study. He is known to be the greatest of commentators and his works are very widely studied by child, laymen and scholar to this day. His work is indispensable to all Chumash (Bible) and Talmud studies. (He was a vintner as well, and made his living making wine in Troyes, France, about a thousand years ago.