It is the only one of Christie's novels not to be set in the 20th century, and - unusually for her - also features no European characters. Instead, the novel is set in Thebes in 2000 BC, a setting for which Christie gained an appreciation of while working with her archaeologist husband, Sir Max Mallowan in the Middle East. The novel is notable for its very high number of deaths and is comparable to And Then There Were None from this standpoint. Christie uses a theme for her chapter titles, as she did for many of her novels, in this case the Egyptian agricultural calendar.