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 In 1934, she and Max Mallowan purchased Winterbrook House in Winterbrook, a hamlet adjoining the small market town of Wallingford, then within the bounds of Cholsey and in Berkshire. This was their main residence for the rest of their lives and the place where Christie did most of her writing. This house, too, bears a blue plaque. Christie led a quiet life despite being known in the town of Wallingford, where she was for many years President of the local amateur dramatic society. Around 1941–42, the British intelligence agency MI5 investigated Christie after a character called Major Bletchley appeared in