DEEP-COVER ASSIGNMENT After Holt McKnight's criminal informant disappears, the DEA agent must go undercover to get close to the missing man's sister, who may know more than she's letting on. But when Blair Sullivan's attacked, it's up to him to protect her--without blowing his cover. Blair isn't sure she can trust her new neighbor, Holt. After all, the last charming and handsome man she fell for was her late husband, and he turned out to be the brother...