Operation Dark Angel by Margaret Kay

Sienna Andrews found herself in danger, alone, and out of options. She ran…straight into the arms of Razor from Shepherd Security, who, has been under cover in a joint Shepherd Security-DEA mission for six long months. She hires the notorious motorcycle gang-leader to transport her to the wilds of Colorado, which is in the vicinity of a suspicious facility he wants to investigate.
Intrigued by this mysterious woman, Razor makes finding out who she is and what she’s running from his mission. He quickly realizes that she is desperately in need of his protection and is as innocent as she is attractive, not what he’d expect of a woman hiring him to help her disappear.
With the entire agency backing him up, her secrets don’t stand a chance of remaining hidden. Her biggest secret is that she just might have everything to do with his mission. The question is, will she trust him and Shepherd Security?
Shepherd Security recruits only the best. They can protect someone in trouble like no other because they work in the shadows, invisible, and outside the system where the rules don’t apply–just the oath they took. They don’t exist. That’s also why they can break any suspect and can get answers out of anyone accused. That’s when they’re called in, when someone must be protected at all costs, or when answers must be obtained, by any means necessary.