Vanished at Kolob Canyon (Red Rock Murders, 6)

For him, the case was personal.

For her, he was the mission.

Ranger Callen Russell never expected skeletal remains found deep in Kolob Canyon would belong to his long-missing sister. A sister who had not disappeared anywhere near the national park. And when the ranger was paired with Special Agent Maeve Perry, a woman from his painful past, Callen knew their involvement was no mere coincidence. Someone wanted he and Maeve, who had been part of the investigation years ago, to see things all the way to the finish. But would it be the end for them all?