Agatha Christie: Hickory Dickory Dock

Hercule Poirot doesn’t need all his detective skills to realise something is troubling his secretary: she has made three mistakes in a simple letter. An outbreak of kleptomania at the student hostel where her sister works is distracting her. The great detective decides that desperate times call for desperate measures, and he agrees to investigate. But desperation is a motive he shares with a killer…