Hawk by Nikki Landis

Hawk, Sergeant at Arms of the Devil’s Murder MC, is loyal and cutthroat when it comes to his club. As a protector of his brothers, enforcer of the bylaws, and security, Hawk takes his position seriously, especially now that his president has been murdered by the Dirty Death MC. He won’t rest until the blood of his enemies has been spilled, and justice served. He’ll make damn sure that Rook is avenged and his son Crow doesn’t meet the same fate.
But Hawk didn’t count on the feisty, outspoken, desperate girl needing to rescue her sister from the dirty politician wreaking havoc in Nevada and the escort service that trafficked her out of the city. Callie is willing to do anything to bring her sibling home—even offer herself to a playboy biker who refuses to be shackled with an ol’ lady.
Hawk never gave a damn about anything other than his club and brothers. Living free and wild without attachment kept his life simple and easy. Now, he’s falling for this sweet girl and willing to invest in more than one night in his bed. Callie has him twisted up, ready to go to war to save her family and hoping to claim the innocent, curvy blonde he can’t get out of his head. When she disappears, he knows he’s the only one able to save her. Can Hawk protect her when everything comes crashing down, or will his need for vengeance risk both their lives?