We're on the case as our favourite book characters team up

Dame Agatha Christie's detectives Hercule Poirot and Miss Marple have joined the Mr Men and Little Miss universe in a new series collaboration.

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The fictional characters have appeared as illustrations in the children's book series to retell and reimagine some of the bestselling novelist's most famous stories.

Two of the books, Little Miss Marple: Muddle At The Vicarage and Mr Poirot: Mischief On The Nile, adapted from Dame Agatha's The Murder At The Vicarage and Death On The Nile, have been published with a further two due to hit shelves in February.