Hercule Poirot and Miss Marple become Mr. Men and Little Miss Characters

Agatha Christie’s legendary detectives Hercule Poirot and Miss Marple are being reimagined as characters in the Mr. Men Little Miss universe. Publisher Farshore confirms the first two books are Little Miss Marple: Muddle at the Vicarage, and Mr. Poirot: Mischief on the Nile. These titles publish today – October 23rd 2025 – with two more books following in February.

It’s the first time Agatha Christie’s mysteries have been reworked to suit pre-school and primary age children in an illustrated book format. Each book promises to be a charming and amusing re-telling of a popular Agatha Christie’s story.

To celebrate the launch, Sanrio is also bringing The Great Little Mystery Book Hunt to London and Manchester from October 27th 2025, kicking off half-term week. The free city-wide book hunt sees hundreds of copies of the new stories hidden across the streets for families and book lovers of all ages to discover.

Publisher Emily Campan, Farshore, said: “We are thrilled to be working with Agatha Christie Limited and Sanrio to bring a charming collaboration between two legendary literary estates – Mr. Men Little Miss and Agatha Christie – to life.”

The current writer and illustrator of the Mr. Men Little Miss series, Adam Hargreaves, added: “My father, Roger Hargreaves, created the Mr. Men in 1971… It has been a real pleasure and an intriguing challenge to bring together the timeless mysteries of Agatha Christie with the playful world of the Mr. Men and Little Miss. Agatha Christie’s iconic stories now have a new twist that neither she nor my father might have imagined!”