Professor Katherine Reed's research had her in a cold sweat. There was only one way to study the effects of cohabitation on behavior-find a male roommate. But Katherine never imagined that sexy Michael Tardo--the bad boy from her past--would volunteer. — Was she immune to the charm that had made her play the fool eight years ago? Probably not. Did he think of her as someone who couldn't be more than a friend? Almost certainly. Katherine might have traded her glasses for contacts years ago, but she knew she didn't have to worry about the bedroom door staying closed. Unfortunately. Then she discovered Michael was planning a little research of his own.