An outstanding new mystery to welcome bestselling Tony Hillerman to HarperCollins UK. The plague that decimated Europe in the fourteenth century appears to have returned today in the high, dry land of the American South-West. But Tony Hillerman's famous pair of detectives, Jim Chee and Joe Leaphorn, discover an even deadlier killer. The victims include not only police but also scientists hunting the key to the dread disease. And the outcome links modern scientific techniques with age-old stories and habits.