This volume, published under the joint auspices of the Jewish Publication Society of America and the Jewish Historical Society of England, forms the first of a series of books dealing with "Jewish Worthies." The aim of this series is to present biographies of famous Jews, with special regard to the general history of the periods at which they lived. Thus in the present book Saladin is almost as much the hero as Maimonides.
The book has been the result of a somewhat unusual form of collaboration. Mr. David Yellin, a short time back, published in Hebrew a biography of Maimonides, which seemed to many worthy of translation into English. But his collaborateur found that it was prefer-