Winter, 1364. Sir Thomas Blackstone, Edward III's Master of War, has been tasked with securing Brittany for England. But soon he is ordered south to Castile, to shepherd Don Pedro, King of Castile, to safety. Accompanied only by a small detachment of his men and a band of Moorish cavalrymen loyal to the king, every step takes Blackstone deeper into uncertain territory and into an unyielding snare. Bok 7 in the "Masters of War" series.