This is an automatically translated description

A series of horrific murders have been committed. Deciding who will be the next victim, the criminal turns... to the alphabet. The unsurpassed detective Hercule Poirot comes into play. Before each murder, an unknown person sends a letter to the detective, telling him where and when blood will be shed again, but the police and Poirot fail to save the victim every time. The chain of evidence leads to the potential killer, an inconspicuous stocking salesman, Alexander Kast. But suddenly the alphabetical scheme fails, and Poirot realises that the killer is someone else...

Agatha Christie is known worldwide as the queen of detective stories. About a billion copies of her works have been sold in English, and another billion have been translated into 100 foreign languages. She is the most popular author of all time. Her books are second only to the Bible and the works of Shakespeare in terms of the number of reprints.