After I get done with DLC Book Jackets, I'm planning on working on a mod that I'm calling "Literary Treasures", which will include rare and unique texts, obscure magicks, and forbidden tomes. My question is: What are some books that would be considered controversial or rare for whatever reason during the end of the 3rd Era? This can include inflammatory texts like "The Common Tongue" from the Tribunal expansion or books from, say, Daggerfall that have a bawdier "1st Edition" version that's been edited over the years. Obscure texts would be something like the "Love Letter". Forbidden or repressed texts might include certain necromantic texts in there, since Necromancy has been banned in Cyrodiil. I'm especially interested in books that were rare in past games or are reputed to contain forbidden knowledge.
Thanks!