Death in the Clouds

Death in the Clouds was a murder mystery novel by Agatha Christie which was first published in 1935. One of Christie's Hercule Poirot novels, the plot involves Poirot investigating the murder of a French moneylender aboard a flight from Paris to Croydon which he was on. Part of the novel's plot (involving a wasp) may have been subconsciously influenced by an adventure Christie shared with the Tenth Doctor and Donna Noble. It was one of a number of Christie's works to be preserved through human history, with an edition owned by the Doctor carrying a publishing date of the year 5 Billion. (TV: The Unicorn and the Wasp)