"Istanbul, 1683: Mehmed IV, sultan of the Ottoman Empire, is preparing to lay siege to Vienna, capital of the Holy Roman Empire, when a mysterious visitor arrives in his bedroom--naked, covered in strange tattoos--to deliver a dangerous, world-changing message. Paris, 2017: Ottoman flags have been flying over the great city for three hundred years, ever since its fall--along with all of Europe--to the empire's all-conquering army. Notre Dame has been...