- You may be looking for the TV story.
According to the Doctor Papers, as published in a book, Doctor Who and the Silence in The Library contained an account of the Doctor's first meeting with River Song in the Library, their battle with the Vashta Nerada, and how the Doctor watched River "burn and die".
According to the papers, it could be found in "all good alternate realities". (PROSE: The Day of the Doctor)