<p>Framed in the doorway of Hercule Poirot’s bedroom stands an uninvited guest, coated from head to foot in dust. The man stares for a moment, then he sways and falls.</p> <p>Who is he? Is he suffering from shock or just exhaustion? Above all, what is the significance of the figure 4, scribbled over and over again on a sheet of paper? Poirot finds himself plunged into a worldof international intrigue, risking his life—and thatof his “twin brother”—to uncover the truth.</p> <p>They are formidable enemies in their own rights: a French scientist, an American millionaire, a brilliant Chinese gentleman, and a master of disguise. But together they are the Big Four, a partnership with one simple goal--murder. Hercule Poirot has never come up against an opponent so vicious . . . or so deadly. Reissue. </p>