Murder on the Orient Express, written by Agatha Christie, is a classic detective novel set aboard the luxurious Orient Express train during its journey from Istanbul to Calais. Here’s a brief summary:

Hercule Poirot, a renowned Belgian detective, is on the train when a man named Mr. Ratchett is murdered. The entire plot unfolds in a locked-room mystery—the train becomes stranded in a snowstorm, and Poirot is called upon to solve the case.