And the more I thought about it, an extended list of different sorts of books came to mind that were classified by their publishers as "nonfiction" but which I still wouldn't consider true:
- Books based on scientific theories which were later disproved (phrenology, geocentrism, etc.).
- Books based on blatant distortion of scientific or historical evidence (Holocaust denial, young earth creationism, etc.).
- "Memoirs" which are, if not constructed of whole cloth, at least at variance with reality.
- Religious books for faiths which the reader does not believe.
Oh, and in case you're wondering how I classified The Pleiadians (sic) Files: I didn't. I tried coming up with a good category name for "books that the author apparently sincerely believes to be nonfiction but which I don't" and instead decided not to spend the brain cycles it would require.