Agatha Christie up to the last chapter, then decided who the most unlikely suspect was, after which she would go back and make the necessary changes to "frame" that person. However, John Curran's "Agatha Christie: The Secret Notebooks" describes different working methods for every book in Christie's bibliography, contradicting the claim by Aldiss. Christie's mature novels, from 1940 onwards, often have titles drawn from literature. Four are from Shakespeare: Three are from the Bible: Another six are from other works of literature: In such cases, the original context of the title is usually printed as an epigraph. Similarly, the title of Christie's
Agatha Christie's Poirot Cusack in "The King of Clubs", Sorcha Cusack in "Jewel Robbery at The Grand Metropolitan", and Sinéad Cusack in "Dead Man's Folly". Phyllida Law and her daughter Sophie Thompson appeared in "Hallowe'en Party". David Yelland appeared as Charles Laverton West in "Murder in the Mews" and as George for the remainder of the series from Series 10 onward, and his daughter Hannah Yelland appeared as Geraldine Marsh in "Lord Edgware Dies". Agatha Christie's grandson Mathew has commented, "Personally, I regret very much that she (Agatha Christie) never saw David Suchet. I think that visually he is much the most convincing