Midnight Rider (Harlequin Intrigue Series #1539)

THIS COWBOY WON'T BACK DOWN 

Houston homicide detective Brittany Garner just got hit with a one-two punch. The twin sister she never knew existed has been found dead, leaving behind a three-month-old daughter. Brittany's vow to find her sister's murderer, as well as the father of the orphaned infant, leads straight to Cannon Dalton. A bull rider who spends his life roaming from rodeo to rodeo, Cannon has only one mission now: protect the beautiful cop and the child who could be his. Caught in the crosshairs of escalating danger—and his powerful desire for Brittany—Cannon races to stop a desperate killer…and a revenge that's been a long time coming.