4.50 from Paddington

Two trainsSide by side for a brief momentIn that moment, a murder Elspeth McGillicuddy is positive she witnessed a man strangling a woman to death. But it was only the merest glimpse through a carriage window as the trains drew parallel. She is the only witness, there are no suspects, and, most importantly, there is no corpse. Who, apart from her friend Jane Marple, would take her seriously? Never underestimate Miss Marple 'All crime writers around the globe owe Agatha Christie a massive debt.'
Peter James 'Never a dull moment.'
The Times

Agatha Christie is known throughout the world as the Queen of Crime. Her books have sold over a billion copies in English with another billion in over 70 foreign languages. She is the most widely published author of all time and in any language, outsold only by the Bible and Shakespeare. She is the author of 80 crime novels and short story collections, 20 plays, and six novels written under the name of Mary Westmacott.