Agatha Christie: Murder on the Orient Express stay as faithful to Christie's work and time era as possible. A major difference between "And Then There Were None" and "Murder on the Orient Express" that Sheldon pointed out was that in the former, the premise of the novel was that no one solved the murder. This forced Sheldon to desperately try to find a way to integrate clues into the story so that the player could actually discover the murderer, although the game remained quite uninteractive. In "Murder on the Orient Express", the actual novel follows an investigation, so Sheldon could more easily integrate clues to lead to
Sleeping Murder the newspaper notice seeking her, which reinforces the story's setting in the 1930s as the author intended in her final revisions done in 1950. Christie’s original manuscript of "Sleeping Murder" was entitled "Murder in Retrospect" after one of the chapters in the book. When the Hercule Poirot novel "Five Little Pigs" was later serialized in the US in "Collier's Weekly" from September to November 1941, the magazine’s editing board retitled it "Murder in Retrospect". This was also the title used by Christie’s American publisher Dodd Mead and Company, presumably in order to capitalize on the recent US serialization. Christie's original