Murder on the Orient Express is a renowned detective novel by Agatha Christie, featuring the famous Belgian detective Hercule Poirot. Set aboard the luxurious Orient Express train, the story unfolds as Poirot investigates the murder of a wealthy passenger, uncovering a web of secrets and motives among the eclectic group of travelers. As Poirot delves deeper into the case, he discovers that each passenger has a connection to the victim, leading to a surprising and intricate resolution. The novel is celebrated for its clever plot twists and has been adapted into several films, making it a timeless classic in the mystery genre.