The Mystery of the Blue Train

Agatha Christie

1928

In Agatha Christie's "The Mystery of the Blue Train," wealthy heiress Ruth Kettering is found dead on the luxurious Blue Train en route to the French Riviera, her valuable rubies stolen. Hercule Poirot, who happens to be aboard, takes on the case. As he delves into a web of tangled relationships and hidden motives, he encounters a diverse cast of suspects, each with secrets and potential motives. Poirot's astute reasoning and attention to detail ultimately unravel the truth behind the murder and theft, revealing a surprising killer in this classic whodunit.