La Dernière énigme

Blurb

Sleeping Murder: Miss Marple's Last Case is a work of detective fiction by Agatha Christie and first published in the UK by the Collins Crime Club in October 1976 and in the US by Dodd, Mead and Company later in the same year. The UK edition retailed for £3.50 and the US edition for $7.95.
The book features Miss Marple. It was the last Christie novel, published posthumously, although not the last one Christie wrote featuring Miss Marple. The story is set in the 1930s, though written during the Second World War. She aids a young couple who choose to uncover events in the wife's past life, and not let sleeping murder lie.