Not Negotiable - Trident Security Series, #4

Shelby wants the one man she can't have. Crushing on a man who deserves more than she can give is a recipe for disaster, so it's best to keep him at arm's length. Parker prides himself on control- taking what he wants when he wants. And has been craving the perky, petite pixie ever since he laid his eyes on her, but she's turned down his every attempt to make her his. When Parker discovers Shelby's hiding a devastating secret, he steps in to help.
and this time he won't take no for an answer. Can he convince her he's fallen in love with her, and if they only have this time together, they should make the best of it?