Marie Ferrarella 
Cavanaugh Standoff [EPUB ebook] 

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!