The Heresy of Jacob Frank is the first monograph length study on the religious philosophy of Jacob Frank (1726-1791), who, in the wake of false messiah Sabbetai Zevi, led the largest mass apostasy in Jewish history. Based on close readings of Frank's late teachings, recorded in 1784 and 1790, this book challenges scholarly presentations of Frank that depict him as a sex-crazed degenerate, and presents Frank as an original and prescient figure at the...