The Incrementalists are a secret society of two hundred people; an unbroken lineage reaching back forty thousand years. They cheat death, share lives and memories, and communicate with one another across nations and time. They have an epic history, an almost magical memory, and a very modest mission: to make the world better, a little bit at a time. Now Phil, the Incrementalist whose personality has stayed stable through more incarnations than anyone else’s, has been shot dead. They’ll bring him back—but first they need to know what happened. Their investigation will lead down unexpected paths in contemporary Arizona, and bring them up against corruption in high and low places alike. But the key may lay in one of Phil’s previous lives, in Kansas in 1859, and the fate of a man named John Brown.