Aboard the luxurious Blue Train from Calais to the Riviera, a wealthy American heiress is found strangled — and her famous rubies have vanished. Hercule Poirot, travelling on the same train, cannot resist the puzzle. The Mystery of the Blue Train (1928) is Christie at her most atmospheric, evoking the glamour and danger of 1920s European rail travel while constructing an intricate web of suspects and motives.
Christie reportedly disliked this novel, but readers have disagreed for nearly a century. Download the free EPUB for a classic Poirot investigation that proves her instincts for misdirection were already fully formed.