Agatha Christie's most famous detectives receive the Mr Men Little Miss treatment! Hercule Poirot meets Mr Men and Little Miss in this new story, written and illustrated by Adam Hargreaves. Loosely inspired by Death on the Nile, but with a charming and humorous twist for younger fans, this is a mystery that requires 'little grey cells' to solve it! Introducing Mr Poirot - a new Mr Men character who is a famous Belgian detective, like someone Agatha Christie fans have already met! Mr Poirot is escaping the winter gloom with a sunny cruise on the River Nile when he meets his friend Colonel Rush, who travels the world tracking down criminals. His relaxing holiday soon includes much mischief and a mystery to solve, with many Mr Men and Little Miss suspects, including Mr Tickle with his extraordinarily long arms! Can Mr Poirot use his little grey cells to solve this most mischievous mystery? This is the first Mr Poirot mystery in a mischievous new partnership, publishing alongside Little Miss Marple: Muddle at the Vicarage. * A thoroughly mysterious (and mischievous) partnership between two British institutions * Brand new stories, inspired by classic Christie novels and reverently brought to life by Adam Hargreaves * Mr Men Little Miss is one of the best-selling picture book brands of all time and celebrates 55 years in 2026 * Roger Hargreaves is one of only 5 authors to achieve sales of over 20m units in the UK (2025 Bookscan) * Agatha Christie's books have sold over a billion copies in English. * Agatha Christie is the most widely published author of all time in any language Competition: Sherlock holmes children's collection;secret seven;dotty;detective friends;minute mysteries;investigators;Breakfast club adventures;danger gang;young;dr who. arthur conan doyle;arianna belluci;enid blyton;clara vulliamy;unity b;marina bowman;tom fletcher;marcus rashford;agatha christie;david walliams.