1. Delete all download content including updates.
2. Clear Cashe. I did this 3 times in a row to be sure it was empty.
3. Delete all game saves. Yes ALL.
4. Start a new game and have the Whiterun house furnished.
Now the good news is that you only have to go to level 15 to get the book.
I used the bookcase just inside the front door. Once you have leveled up, do
a couple of hard saves for a back-up. You can now reinstall all download content
and continue your game. I used an original disk, and the DLC disk from Legendary,
but I think any combination should work. Good luck!