On Borrowed Time by David Rosenfelt

Journalist Richard Kilmer is extremely happy with his girlfriend Jen. So much so that he asks her to marry him the weekend that he meets her parents in her hometown of Ardmore, New York. The event turns to tragedy, however, when Richard and Jen are in a car accident during a freak storm and Jen disappears. After the crash, Richard is stunned when he can find no trace that Jen ever existed. No one in Ardmore knows her and Richard's own friends in New York City don't either. Wondering if he going crazy or if something sinister is going on leads Richard to delve into his life and the town of Ardmore. With the help of Allie Tynes, who might be Jen's identical twin sister, Richard just might uncover the truth. On Borrowed Time is another great page turner from Rosenfelt.