In this valuable reference, Dr. Ronald L. Eisenberg catalogs and explains the importance of more than two hundred figures who are most vital to an understanding of the teachings of the post-Talmudic rabbis. For these figures, who fall into the categories of Geonim (rabbis writing from 600-1100), Rishonim (1100--1500), and Acharonim (1500-present day), Eisenberg provides summaries of major teachings and scholarly contributions, as well as biographical information and illustrative quotations from relevant writings.