Hidden — Ann B. Harrison

Detective Scarlett Hayes is on the trail of a major drug bust when things start to go wrong. That shouldn't have been a surprise to her because she has a knack for getting into trouble while solving the most difficult cases.
This time her boss decides to bring in the big guns in the form of Casa Reeves to help her out.
He is egotistical, dominating, and far too clever for her liking, with the directive to give him anything he wants, she has no choice but to play nice. He smugly solves the email trail and together they plan a major strike on the infamous ‘smack track' coming into San Francisco.
Casa is shot trying to protect Scarlett but he falls to pieces when she least expects it. He is hiding a deadly secret, one that he refuses to share. But they are both hiding important details from each other, details that will get both of them into trouble if they don't join forces to solve the case that has them connected in a way they would never have imagined.