The Horses of Diomedes

Four sisters, growing wilder and more unruly, staying out all night at their cocaine parties. Poirot feels sorry for their father, General Grant, who is trying and failing to control his flashy girls, but can Poirot prevent a drug fuelled tragedy?

Published in 1940 in Strand Magazine in the UK and This Week in the US in 1945, under the title The Case of the Drug Peddler. It was included in the collection The Labours of Hercules in 1947, which was adapted for TV in 2013, as part of the final series of Agatha Christie's Poirot.