A Stranger in the House opens with Tom Krupp coming home from work to find his wife, Karen, missing despite seeing dinner already in progress. Realizing that she left her purse and cell phone behind, he becomes concerned and calls 911. Before he knows it, the police are at his door to notify him that Karen has been in a serious car accident where she was driving recklessly and crashed into a pole. Tom is puzzled as to why his wife would have left the house so abruptly, and how did she end up in the seediest area of town? This sets in motion an investigation which has at its core, the murder of an unidentified man who was found nearby in an abandoned restaurant. Who murdered him? Will the police charge Karen, who now has amnesia, with reckless driving, or worse, murder? What role does Karen's neighbor, Brigid play in all this? And what about Tom, is he as innocent as he seems? This police procedural/psychological thriller is a fast- paced read that keeps you wondering until the very end as all these questions and more are answered. This is Lapena's second thriller (the first was her well-received debut, The Couple Next Door).