"The writing of books on Jewish history has attracted many a scholar during the last century and a half. The multifaceted background of today's Jews and Judaism is itself an invitation to see relationships and to propound historiosophical theories and constructions. Yet it is only the rare Jewish historian who has actually mastered the intricacies of Rabbinic literature, and who can thus speak with real authority about a system of beliefs and practices, of legal decisions and theological opinions, which both regulated and reflected the actual life of the Jews in various parts of the world during a time-span of almost two thousand years. Rabbi Phillip Sigal has mastered that literature, and he therefore does speak with authority - and not only about that literature itself, but also about the challenges to which Rabbinic Judaism had been subjected ever since it had come into existence."
Dr. Jakob J. Petuchowski, formerly of Hebrew Union College - Jewish Institute of Religion, Cincinnati, Ohio