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1 The story took place on the Orient Express, a train moving through winter
2the story is about an investigation of an unusual murder.
3.The main character is Hercule Poirot, an amazing detective. and there were some passengers but a few 
4. The detective is very truthful. This book is one of the best by A.Christie
5.A very rich but unpleasant person (a man) was killed on the train at night. Poirot had to investigate the case and find out who was the killer.
6. the end is very unexpected: killers are all the other passengers!