Ahead of "A Haunting in Venice," Check Out All of Agatha Christie's Mystery Books

Tommy and Tuppence is the only one of Christie's collections to focus on a crime-solving duo, rather than a single, brilliant detective. Thomas and Prudence Beresford are a husband-and-wife team who work together to crack their cases. After being friends for most of their lives, they meet up after World War I, launch an investigative agency, fall in love, and get married. Unlike the other Christie detectives, they explicitly age in "real time" throughout their series, growing older and raising a family along with their mystery exploits.

Tommy and Tuppence Books in Order

1. "The Secret Adversary" (1922)
2. "N or M?" (1941)
3. "By the Pricking of My Thumbs" (1968)
4. "Postern of Fate" (1973)