Six Days to Live — Kenneth M. Page

Sometimes disaster is simply a matter of being in the wrong place at the wrong time. Take Addison Roberts, for example: it is a deadly coincidence that in a crowded parking lot one day, she catches the eye of a dangerous criminal on the run. In his desperation to evade the police, what he needs is a way out -- and Addison and her car are his ticket to escape. 

Lieutenant Chase Roberts, on leave from his military assignment, is anxious to be reunited with his wife. Yet as night falls and Addison fails to appear, Chase feels a rising sense of foreboding. Hours quickly become days as he desperately works with authorities to find the woman he loves. But after being named a person of interest, Chase is warned away from the investigation -- a mandate he ignores. Chase will stop at nothing to find his wife, and what he ultimately discovers is terrifying: Addison has been carjacked by a man who has killed before and has no scruples about killing again . . .