The close of the Chasing Graves Trilogy. Araxes has spent two books selling its dead to itself; here the ledger comes due, and the city that made a currency of souls finds out what happens when the currency decides where it goes. Caltro's arc from murdered locksmith to something the living have to bargain with finishes on the trilogy's own terms — grim, mercenary, and unsentimental about who deserves to survive it.
Summary by Loreful, from public sources