Agatha Christie wrote around 75 full-length novels, including 66 detective novels and 14 short-story collections, plus numerous plays and works under a pseudonym.

Quick Scoop: Agatha Christie’s Book Count

Most modern references break down her output roughly as follows:

  • About 66 crime/detective novels (Hercule Poirot, Miss Marple, Tommy & Tuppence, and standalones).
  • Around 14–15 short story collections, depending on how posthumous collections are counted.
  • Over 150 individual short stories overall.
  • More than 25 plays, including the legendary “The Mousetrap.”
  • 6 novels written as Mary Westmacott (her secret pseudonym for more romantic/psychological fiction).
  • 2 autobiographical works.

Because different sources count posthumous collections and re-packaged short stories differently, you’ll sometimes see totals like “over 75 novels” or “around 70 books,” but the widely cited core figure is 66 detective novels plus her short-story collections and other works.

In forum and trivia discussions, the safest precise answer to “how many books did Agatha Christie write” is usually:
“She wrote 66 detective novels and 14 short-story collections, plus plays, short stories, and books under a pseudonym.”

Information gathered from public forums or data available on the internet and portrayed here.