The Closer He Gets (Brothers, Strangers, 1)

She can't save herself…but he can 

It took the twenty-fifth anniversary of his kid sister's death to bring Zach Carter home. Determined to solve her murder with his training as a homicide detective, he discovers that his estranged brother has beaten him to the punch and is already on the local force. The two, divided in their parental loyalties and their suspicions, struggle to make headway, until Zach is witness to a fatal beating where the guy left standing is a cop. And a second witness is a gorgeous brunette. Zach is in the impossible situation of protecting Tess Granath from the sheriff's department while fighting his attraction to her. He's always known he's a man who can't commit. Except now he's met a woman he can't walk away from…