A journalists execution by a New York City group pledging fealty to ISIS turns personal when the killers announce that their next victim will be NYPD Captain Nikki Heats husband, a case that is further complicated by glimpses of a woman Nikki recognizes as her long-dead mother. By a New York Times best-selling author. TV tie-in. 150,000 first printing. Richard Castle, New York Times mega-bestselling mystery writer and star of ABCs hit primetime show Castle is back with his eighth novel of his popular Nikki Heat series.