I put a combination of books, letters, papers, scrolls and small knickknacks on my empty shelves. On a shelf I was using as a hutch in my dining room I put pretty bowls, pitchers and glasses.

I found the best way to place them was to place the item in front of the shelf then use the precision editor to line it up first, then slide it into place.

Yep, as the others said, you can buy the Crowns-only Book Rows from the Editor or buy the Mages Guild book replicas from the vendor after collecting all Lorebooks from a set (Dwemer for example looks super fancy). You can also craft a special levitating Book Row and Book Stack if you have enough Psijic Order ranks (Summerset).



Here's a list of all Book and other Literature furniture:
https://eso.mmo-fashion.com/category/database/item-type/furnishing/library/literature/

Essential housing tool addon pc allows you to make books - both individually and in rows - that others with the addon installed can see once it's been uploaded.

Row of Books example


This is an example of an entire filled bookcase EHT has as well


And this is the exterior of a book which you can write a story or anything in


And the interior I've put as a spoiler for those who don't need a sad sappy cat dying story from me.