This is the tenth full length Hercule Poirot novel first published in 1935. The murder occurred on a flight where Hercule Poirot was a passenger. The list of suspects are introduced to the reader early on. Imagine, all the suspects are known. And the seating plan on the plane was provided as well. Poirot even gave us a clue or two on what was important for solving the case. Of course nothing is that straight-forward or simple. A wonderful mystery that moves along at a very good pace and leaves the reader guessing all the way through.