Book (The Day of the Doctor)
The Doctor wrote a book about the last day of the Last Great Time War.
The primary bulk of the book consisted of the Doctor Papers, which were punctuated by excerpts from the Doctor which, due to time constraints, they were forced to write "live" via a psychic time-space link as they were being read, taking advantage of the books publication on psychic paper to do so. An audiobook version was also available.
Their desire to write the book was first expressed by the Curator to the Brigadier during one his visits. Alistair told him that information within it was classified material to which the Curator responded he had a plan to mark the book as fiction. (PROSE: The Day of the Doctor)