Death in the Clouds
From Tardis Wiki, the free Doctor Who reference
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.
Inside page noting date of publication of Death in the Clouds as 5,000,000,000 (DW: The Unicorn and the Wasp)
Part of the novel's plot (involving a wasp) may gave been subconsciously influenced by an adventure she shared with the Tenth Doctor and Donna Noble. It is 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. (DW: The Unicorn and the Wasp)
File:Doctor Death in the Clouds.jpg
The Doctor holding his copy of Death in the Clouds (DW: The Unicorn and the Wasp)
