Lutheran preacher and theologian Andreas Osiander (1498–1552) played a critical role in spreading the Lutheran Reformation in sixteenth-century Nuremberg. Besides being the most influential ecclesiastical leader in a prominent German city, Osiander was also a well-known scholar of Hebrew. He composed what is considered to be the first printed treatise by a Christian defending Jews against blood libel. Despite Osiander’s importance, however, he remains surprisingly understudied. The Apocalypse in Reformation Nuremberg: Jews and Turks in Andreas Osiander’s World is the first book in any language to concentrate on his attitudes toward both Jews and Turks, and it does so within the dynamic interplay between his apocalyptic thought and lived reality in shaping Lutheran identity. Likewise, it presents the first published English translation of Osiander’s famous treatise on blood libel. Osiander’s writings on Jews and Turks that shaped Lutherans’ identity from cradle to grave in Nuremberg also provide a valuable mirror to reflect on the historical antecedents to modern antisemitism and Islamophobia and thus elucidate how the related stereotypes and prejudices are both perpetuated and overcome.