This riveting second installment in Stephenson and company's epic tale focuses on the aftermath of the world-shattering Mongolian invasion of 1241 and the difficult paths undertaken by its most resilient survivors. The Shield Brethren, an order of warrior monks, search for a way to overthrow the horde, even as the invaders take its members hostage. Forced to fight in the Mongols' Circus of Swords, Haakon must prove his mettle or lose his life...