By the Pricking of My Thumbs By the Pricking of My Thumbs By The Pricking of My Thumbs is a work of detective fiction by Agatha Christie and first published in the UK by the Collins Crime Club in November 1968 and in the US by Dodd, Mead and Company later in the same year. The UK edition retailed at twenty-one shillings (21/-) and the US edition at $4.95. It features her detectives Tommy and Tuppence Beresford. Tommy and Tuppence were unusual in that they aged from novel to novel unlike Miss Marple and Hercule Poirot, whose age remained more or less the same from Christie's
Tommy and Tuppence the four novels are "The Secret Adversary" (1922), "N or M?" (1941), "By the Pricking of My Thumbs" (1968); and "Postern of Fate" (1973). "Postern of Fate" was the last novel Christie ever wrote, although not the last to be published. Tuppence appears as a charismatic, impulsive, and intuitive person while Tommy is less imaginative and less likely to be diverted from the truth (as their first adversary sums him up "he is not clever, but it is hard to blind his eyes to the facts") which is why they are shown to make a good team. It is in