The Invisible Ones — Stef Penney

Small-time private investigator Ray Lovell veers between paralysis and delirium in a hospital bed. But before the accident that landed him there, he'd been hired to find Rose Janko, the wife of a charismatic son of a traveling Gypsy family, who went missing seven years earlier. Half Romany himself, Ray is well aware that he's been chosen more for his blood than his investigative skills. Still, he's surprised by the intense hostility he encounters from the Jankos, who haven't had an easy past. Touched by tragedy, they're either cursed or hiding a terrible secret-whose discovery Ray can't help suspecting is connected to Rose's disappearance. . . .