Murder on the Orient Express by Agatha Christie is a classic detective novel featuring Hercule Poirot.

While traveling on the luxurious Orient Express train, a wealthy man named Samuel Ratchett is found murdered in his compartment. The train is stuck in snow, and Poirot realizes the killer must be one of the passengers.

Through clever questioning, he uncovers that everyone on board had a connection to an old crime — and they all took part in the murder together.