Matthew Davenheim, a rich banker, disappears on a walk from his country house to the village post office, and Inspector Japp of Scotland Yard is put onto the case. Poirot, who has developed an interest in conjuring tricks, bets Japp five pounds that he can solve the mystery without leaving his apartment.

Poirot is called in when the British Prime Minister and his secretary are kidnapped in France on their way to a League of Nations conference - and he is given just a day and a half to solve the case.

The London and Scottish Bank is sending a huge shipment of Liberty Bonds to New York on the liner Queen Mary. Poirot, who suffers terribly from sea-sickness, is asked to see the bonds safely across the Atlantic.

Poirot is called in to help a woman who lives in fear of her husband, and he is invited to a dinner party which goes horribly wrong.

Poirot prepares to spend a quiet Christmas on his own with a box of chocolates, but he has to give up his plans when the British government asks for his urgent help. Prince Farouk, a young member of the Egyptian royal family visiting London, has lost a famous ruby, and this is deemed to be a matter of national security.

Beside the bodies of three murder victims lies a copy of the ABC Railway Guide.

Mrs. Opalsen's famous pearls are stolen and Poirot is happily on hand to investigate. A complex theft calls for a sophisticated solution. Unfortunately, Poirot is hindered everywhere he goes by being mistaken for 'Lucky Len'.

A string of thefts at a student hostel run by Miss Lemon's sister ends in death and Poirot has a number of plots and sub-plots to untangle. A certain mouse is the only witness to a string of murders.

Poirot and Hastings are on holiday in Deauville and receive a visit from Paul Renauld, who believes he's being cheated by Chileans. Renauld is kidnapped and his body is later found buried in a new golf bunker. French detective Giraud unwisely challenges Poirot to catch the killer before he can.

Living quietly in the small village of King's Abbot, sleuth Hercule Poirot becomes involved in the murder of successful industrialist Roger Ackroyd. The number of potential killers is almost as great as the population of the village itself. As Poirot investigates he sees that there might be a connection to the suicide of a local woman, and the death the previous year of her husband.