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In page The Mystery of the Blue Train:

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Mere months after this novel was published, prolific French novelist Arthur Bernède published Le mystère du train bleu, in 1928.[2] A murder mystery adventure featuring Bernède's own popular detective, Chantecoq, the story is set in Paris and the plot is completely different, although it seems likely that Bernède was hoping to benefit from Poirot's popularity.[citation needed]