A Corpse in the Library - Agatha Christie

At seven o'clock in the morning Colonel Bantry and his wife awoke to find the body of a girl lying on the carpet in front of the fireplace in the library room!

Who is she? How did you get to their library? What is the connection between her and that other girl whose body was found burned in a car not far away?

Mrs. Bantry has no one else to turn to but her best friend, Miss Marple, so how will the old spinster solve this exciting mystery?