The new-look series of Hercule Poirot books for the 21st century.
Framed in the doorway of Poirot's bedroom stood an uninvited
guest, coated from head to foot in dust. The man's gaunt face
stared for a moment, then he swayed and fell.
Who was he? Was he suffering from shock or just exhaustion? Above
all, what was the significance of the figure 4, scribbled over and
over again on a sheet of paper? Poirot finds himself plunged into a
world of international intrigue, risking his life to uncover the
truth about 'Number Four'.
