Wraith's Revenge - Last Sword in the West, #4

Haunted by the ghosts of the past, pursued by an implacable foe, Tomas and Elzeth finally meet a warrior they can't defeat. Tomas is on the run. Hunted by the church, the Family, and the marshals, there are few safe places left, even on the frontier. He flees, plagued by regrets, questioning the choices that made him the most wanted man in the west. As ghosts from his past rise from the grave, Tomas comes face-to-face with a new foe, a host who stands for everything Tomas has fought against.
A monster blinded by faith. Tomas must confront his past if he hopes to have a future. But even that might not be enough.