“I was thrilled to see Poirot in such very, very good hands.”— Gillian Flynn, New York Times bestselling author of Gone GirlThe world’s most beloved detective, Hercule Poirot—the legendary star of Agatha Christie’s Murder on the Orient Express and Death on the Nile—returns in a delectably twisty mystery.Hercule Poirot is travelling by luxury passenger coach from London to the exclusive Kingfisher Hill estate. Richard Devonport has summoned him to prove that his fiancée, Helen