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 bibliography at March 2018, was still running; in 2009 the London run exceeded 25,000 performances. In September 2015 a public vote identified "And Then There Were None"—originally published in 1939 under the name "Ten Little Niggers"—as the public's favourite Christie novel; the book was the writer's favourite, and the one she found most difficult to write. In September 1930 Christie married the archaeologist Max Mallowan. The pair travelled frequently on archaeological expeditions and she used the experiences as a basis for some plots, including "Murder on the Orient Express" (1934), "Murder in Mesopotamia" (1936) and "Death on the Nile" (1937). She