The Yellow Iris

Poirot is caught up in a coup d'etat in Argentina and arrested as a spy, which hinders him from solving the murder of Iris Russell at a French restaurant owned by an Italian in Buenos Aires. Two years later, in London, a dinner-party at a restaurant of the same name marks the second anniversary of Iris's death. The atmosphere is so charged that we almost expect the victim to come back from the dead. And, of course, Poirot traps a killer.