Hercule Poirot series by Agatha Christie If Agatha Christie is the queen of whodunnits, Hercule Poirot is perhaps her most trusted imaginary advisor. The Belgian detective has shown up onscreen many times, including recent portrayals by Kenneth Branagh in Death on the Nile and Murder on the Orient Express.

Cain's Jawbone is a murder mystery puzzle written by Edward Powys Mathers under the pseudonym "Torquemada". The puzzle was first published in 1934 as part of The Torquemada Puzzle Book.