Taming the Night — Paula Detmer Riggs

Dr. Summer Laurence knows the horror of addiction from the wrong side. But after life-changing therapy, she becomes a drug counselor, hoping to help young kids before they get into trouble. When Summer's dear friend Dottie offers her an old house to convert into a counseling facility, Summer jumps at the chance to make her Phoenix Ranch dream come true.

There's only one problem: Dottie's suspicious nephew, Brody Hollister, the local chief of police who goes by the book no matter who it hurts. Brody despises drug users and thinks counseling is useless for most of them. But there is something about Summer he can't ignore. Her smile touches a place in his heart that was damaged on a terrible night years ago. He no longer believes in second chances, least of all for himself. Yet when he's in Summer's arms, he is tempted by possibilities ....