Shadow Promise (Shadow Force #1)

Cade Montgomery will always carry the guilt for the men who died on his watch, and he will stop at nothing to find the people responsible. When Piper Collins, his former foster sister and the woman who stole his heart more than ten years ago, resurfaces, things get complicated.

Piper Collins left the FBI after her fiancé died three years ago, to find his killer. That search leads her to Atlanta and back to Cade, the man who broke her heart when he left and never returned. When Cade meets with two men who are working for a known drug lord at the bar where she’s working undercover, Piper is disappointed to find he turned to a life of crime instead of being the man of conviction she used to know. But things aren’t adding up, and Piper hopes that, with his help, her fiancé’s killer will be brought to justice.