UNFINISHED BUSINESSA killer was loose in Colorado, and evidence specialist Cassie Dumont was determined to prove her expertise to the skeptical local cops. So the arrival of FBI agent Seth Varitek, a man she'd clashed with before, didn't sit well with her competence, her ego…or her libido.The last time they'd crossed paths, Seth saw just how close Cassie got to a violent criminal. His refusal to confront that fear again convinced him to keep the feisty criminologist at arm's length. Before long, working together became an exercise in torture — especially once the murderer they were tracking made Cassie his next target.…