Accorded the surname “Medici” by his patron, Grand Duke Cosimo III, Paolo (né Moses) Sebastiano (1671-1738), a Christian neofito (convert), was fanatical in his public condemnations of Jewish people and practices. As a priest and professor of Hebrew and Holy Scriptures at the University of Florence, he published works that popularized claims of deicide, usury, blood libel, and endorsed forced conversations for the “unrepentant.” This book, although replete with such heinous accusations, also yields many insights into the then-contemporary Jewish world.