"In the mid-eighteenth century, as new ideas ... begin to sweep the Continent, a young Jew of mysterious origins arrives in a village in Poland. Before long, he has changed not only his name but his persona; visited by what seem to be ecstatic experiences, Jacob Frank casts a charismatic spell that attracts an increasingly fervent following. In the decade to come, Frank will traverse the Hapsburg and Ottoman empires with throngs of disciples in his...