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
The Murder on the Links in the 1928 short story "Double Sin" which was published in book form in the US in "Double Sin and Other Stories" in 1961 and in the UK in "Poirot's Early Cases" in 1974. Some plot twists are inspired by Sir Arthur Conan Doyle's "The Adventure of the Abbey Grange". The novel received its first true publication as a four-part serialisation in the "Grand Magazine" from December 1922 to March 1923 (Issues 214–217) under the title of "The Girl with the Anxious Eyes" before it was issued in book form by The Bodley Head in May 1923. This was Christie's