Hard Truth - Nevada Barr

Park Ranger Anna Pigeon comes face-to-face with the dark side of humanity when she investigates the disappearance of three young girls in Rocky Mountain National Park. Just days after marrying Sheriff Paul Davidson, Anna Pigeon moves to Colorado to assume her new post as district ranger at Rocky Mountain National Park. When two of three children who'd gone missing from a religious retreat reappear, Anna's investigation brings her face-to-face with a paranoid sect--and with a villain so evil, he'll make the hairs on the back of your neck stand on end