In this romantic suspense mystery by a USA Today?bestseller, a gruff detective and his rookie partner search for a puzzling serial killer. For homicide detective Ronan Cavanaugh O?Bannon, this time it?s personal . . . and totally baffling! A police friend is found executed in the same manner as rival gang members. There?s no progress in finding Aurora?s serial killer . . . until Sierra Carlyle joins the team. The perky young newbie is as chatty and extroverted as Ronan is taciturn and closed off. Frankly, she irritates him, but she?s a brilliant, relentless investigator. Working together, facing danger, Sierra?s warmth begins to thaw Ronan?s iciness. But acting on their undeniable attraction proves unwise now. There?s a killer to find and stop . . . before he sets his sights on a Cavanaugh!