End of Watch

The third Bill Hodges novel (2016) reintroduces supernatural elements after the first two operated as pure crime thrillers. Brady Hartsfield, the Mercedes Killer, regains consciousness in the hospital and develops psychic abilities, using them to compel victims to commit suicide through a video game app. King has described this as his attempt to write a detective trilogy where the supernatural sneaks back in through the back door.

Zappit is a handheld video game console that Brady weaponizes from his hospital bed. He loads it with a hypnotic game—Fishin' Hole—that includes a subliminal loop capable of pushing vulnerable users toward suicide. The Zappit units are distributed to survivors of the Mercedes massacre, making them the primary mechanism of the novel's horror.

Most readers consider it a strong close to the arc, particularly because King brings Brady back as a genuine supernatural threat rather than a diminished figure. The novel resolves Hodges's personal story definitively. Some readers felt the supernatural turn was a departure from the grounded crime tone of Mr. Mercedes and Finders Keepers.

Yes. Holly has grown significantly across the trilogy—from a peripheral figure in Mr. Mercedes to a full partner in detective work by the end. End of Watch positions her as Hodges's essential collaborator, and King has said he was surprised by how central she became. She went on to appear in subsequent King novels and novellas.