Hell yes. Books are an integral part of the Elder Scrolls experience, not to mention giving a deep sense of cultural immersion in the game's setting. I think that's one of the reason's Morrowind's lore is so well received, and people seem a little more disapointed with Oblivions. In Oblivion, a lot of the books from Morrowind were added, with the rest of the new ones mostly being generic tomes describing Tamriel instead of Cyrodil. It just meant that players couldn't get such a good grasp on the people and mythos of Cyrodil as they did Vardenfall and Morrowind. If Skyrim could have vast swaths of literature too, it would go leaps and bounds towards rectifying the issue.
This... .and better bookshelves.
Oh
hell yes. Perhaps have an interface, where if you interact with the bookshelf, a menu will pop up, and ask if you want to store items internally in the shelves at the bottom (at which point you go to the regular inventory screen for using a container), or stack books on the shelves. If you stack the books, it would automatically compile them on the shelf in order of size or something. Maybe alphabetically. Not really important either way. What is important is a method for players to create libraries without being induced into murderous rage by frustration.
I think there's mods for this, so having it built in to Skyrim would be a godsend. Especially for console players, who live through hell on that front anyway.