Deadly Justice (New Orleans Connection #6) by Kathy Ivan

A quest for justice…

After a devastating betrayal, ex-DEA agent Samuel “The Ghost” Carpenter devotes his life to searching for the person who cost him not only his job but nearly his life. When he discovers a link between the man he’s hunting and a beautiful executive assistant, he realizes the path to his target is seduction—a task he’s all too eager to undertake, since he can’t seem to resist the alluring beauty.

…turns into a dangerous seduction.
Andrea Kirkland can’t fathom the sudden interest rich and powerful Samuel Carpenter’s showing, but she’s not stupid. He’s got a deeply-hidden agenda and she’s a means to an end. Except, she has secrets of her own, and despite their instantaneous chemistry, she’s not above using Carpenter to further her own vendetta.

On a whirlwind journey from Dallas to New Orleans, passion explodes between them. But when a murderer strikes, Carpenter must choose between his mission of vengeance or face losing the woman he loves to a vindictive madman hellbent on revenge.