2024 Reprint of the 1927 Edition. In this mystery, created from a reworked collection of short stories, Poirot enters the world of international espionage. The original stories were published in 1924 and it was in 1926 that Agatha Christie, in need of a new book, gathered them together with the help of her brother-in-law and submitted them to her publisher. Summary: An unexpected visitor called Mayerling comes in through Hercule Poirot's...