In a later review, Robert Barnard wrote that this novel is "One of the top ten, in spite of an overcomplex solution. The familiar marital triangle, set on a Nile steamer." The weakness is that there is "Comparatively little local colour, but some good grotesques among the passengers – of which the film took advantage." He notes a change in Christie's novels with this plot published in 1937, as "Spies and agitators are beginning to invade the pure Christie detective story at this period, as the slide towards war begins."