4.50 from Paddington - Agatha Christie

THE ANTHONY AWARD-WINNING SLEUTH Elspeth McGillicuddy is not given to hallucinations. Until she witnesses a murder at Paddington Station. But did she? No victim, no suspect, no other witnesses. In fact no one believes it really happened at all. Except her friend Miss Jane Marple, and she's returning to the scene of the crime to discover just exactly what Mrs. McGillicuddy saw.