As Hercule Poirot sifts through his post one particular morning, he alights upon a letter from an elderly and (as it transpires), exceedingly rich spinster - Miss Emily Arundell. She is clearly in great distress and seeking his help, but doesn't say why. Her only specific mention is 'the incident of the dog's ball'.
The third novel in Annie Murray's "Birmingham" series. While Genie's father is away fighting in World War II, her mother has a ruinous affair which leaves her pregnant; Genie's little brother leaves, never to return; while Genie herself meets a man who then disappears to war.