New York Times bestselling author Hampton Sides returns with a white-knuckle tale of polar exploration and survival in the Gilded Age In the late nineteenth century, people were obsessed by one of the last unmapped areas of the globe: the North Pole. No one knew what existed beyond the fortress of ice rimming the northern oceans, although theories abounded. The foremost cartographer in the world, a German named August Petermann, believed that warm...