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: An Autobiography Gregg, the director of six of her plays who, in his 1980 memoir "Agatha Christie and All That Mousetrap", spoke with some disparagement of Christie, stating at one point, “She owed an enormous debt to Peter Saunders yet in her autobiography she gives him scant mention. Speaking of "The Unexpected Guest" (which Gregg directed) she says quite simply that she wrote it. I think perhaps she didn’t like to confess – to herself, even – that her theatrical accomplishments could not be achieved without help.” However, Janet Morgan, Christie's official biographer, considered the "Autobiography" to be “an enchanting book, fluent,