In appearance Hercule Poirot hardly resembled an ancient Greek hero. Yetreasoned the detectivelike Hercules he had been responsible for ridding society of some of its most unpleasant monsters. So, in the period leading up to his retirement, Poirot made up his mind to accept just twelve more cases: his self-imposed 'Labours'. Each would go down n the annals of crime as a heroic feat of deduction.