An Universal History of Fable and Demonology Written at the End of All Time
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An Universal History of Fable and Demonology Written at the End of All Time was a book the Doctor had in his TARDIS library. It contained information on Maribu. (AUDIO: Time Reef)
When the Mara took possession of the Fifth Doctor, it located the book and tore out the pages regarding its own history and lore to help it establish the Sumaran Empire on Manussa several centuries early. (AUDIO: The Cradle of the Snake)