The Exorcist's Vengeance

Exorcist Arthur Potter is killed by his wife, who has fallen under the control of a demon, and the loss of their unborn child leaves him with nothing but a burning need for payback. Refusing to stay dead quietly, he strikes a desperate bargain with a dark power named Je. The deal offers him a chance to hunt down those who wronged him, but every step pulls him deeper into a world of forbidden magic and the monsters that feed on it.