Sabbatai Zevi (1626-76) stirred up the Jewish world of the mid-seventeenth century by claiming to be the messiah, then stunned it by suddenly converting to Islam. His story, and that of the movement he created, is a landmark event in early modern Jewish history and a dramatic example of what can happen when mystic dreams and messianic hopes combine in an explosive mixture. Now, for the first time, English readers can experience these events...