- You may be looking for the similar real world novel.
Doctor Who Discovers Pirates was a book written by the Fourth Doctor. (PROSE: Doctor Who Discovers Pirates)
When the book was written is an enigma. Before the novel, five Doctor Who Discovers books were known to exist: Doctor Who Discovers Early Man, Doctor Who Discovers Prehistoric Monsters or Doctor Who Discovers Prehistoric Animals, Doctor Who Discovers Space or Doctor Who Discovers Space Travel, Doctor Who Discovers the Conquerors, and Doctor Who Discovers Strange and Mysterious Creatures. (AUDIO: The Kingmaker, PROSE: Doctor Who Discovers Early Man, Doctor Who Discovers Prehistoric Animals, Doctor Who Discovers Space Travel, Doctor Who Discovers The Conquerors, Doctor Who Discovers Strange and Mysterious Creatures) According to one source, the Doctor never finished his sixth novel, and was later contacted during his fifth incarnation to complete his contract. In this source, his sixth novel was Doctor Who Discovers Historical Mysteries, which would have dealt with unsolved moments in history. (AUDIO: Doctor Who Discovers Historical Mysteries)
Despite this, Doctor Who Discovers Pirates seemed to be a sixth part of the series written before the Doctor's fifth incarnation. (PROSE: Doctor Who Discovers Pirates)