Book Summary from S J Watson's site
Christine wakes up every morning in an unfamiliar bed with an unfamiliar man. She looks in the mirror and sees an unfamiliar, middle- aged face. And every morning, the man she has woken up with must explain that he is Ben, he is her husband, she is forty-seven years old, and a terrible accident two decades earlier decimated her ability to form new memories.
I think this is a good debut, good try.