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An uninvited guest, coated in dust, sways and falls in the doorway of Poirot's bedroom. Who is he? What is the significance of the figure 4, scribbled repeatedly on a sheet of paper? Poirot is plunged into a world of international intrigue, risking his life to uncover the truth about "Number Four".
Genre: Mystery
Genre: Mystery
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Used availability for Agatha Christie's The Big Four