"The famous Orient Express, thundering along on its three days' journey across Europe, came to a sudden stop in the night. Snowdrifts blocked the line at a desolate spot somewhere in the Balkans. Everything was deathly quiet. "Decidedly I suffer from the nerves," murmured Hercule Poirot, and fell asleep again. He awoke to find himself very much wanted. For in the night murder had been committed. Mr. Ratchett, an American millionaire, was found lying...