The Queen of Mystery has come to Harper Collins! Agatha Christie, the acknowledged mistress of suspense?creator of indomitable sleuth Miss Marple, meticulous Belgian detective Hercule Poirot, and so many other unforgettable characters?brings her entire oeuvre of ingenious whodunits, locked room mysteries, and perplexing puzzles to Harper Paperbacks?including Murder on the Orient Express, the most famous Hercule Poirot mystery, which has the brilliant detective hunting for a killer aboard one of the world?s most luxurious passenger trains.