Mr Davenheim, a wealthy financier, leaves his home to mail a letter, then fails to return. The story fills the newspapers and intrigues Hercule Poirot, who challenges Inspector Japp that he can solve the case before the police, and without leaving his flat.
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 100 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.