The Mystery of the Blue Train

by Agatha Christie

The Mystery of the Blue Train revolves around a set of fabulous rubies, said to have been worn by Catherine the Great, now purchased by an American millionaire as a gift to his daughter. When she takes them with her on a luxury train to the Riviera, she is unaware that among her fellow passengers are her unfaithful husband, his not-so-secret mistress, a quiet Englishwoman who believes that nothing exciting ever happens to her—and the famous retired detective Hercule Poirot. And, possibly, a murd