Something I did notice in my own playthrough is that there are no bookshelves in Enderal that act the same way as the Skyrim ones. I know we can store books in the cabinets called book cases but they act as chests, not shelves.
It is not a simple thing to fix however as Enderal makes fairly broad use of books out on display as "open books" that you can read and sometimes pick up. These ones all look like the same open business ledger when you first find them but look like proper readable books with my new covers in your inventory. As soon as you put one of these on a Skyrim-style bookshelf or drop them on a table, they revert to the business ledger model.
If the Enderal team accepted a change request to allow bookshelves in the future, these ledger-style books would have to be scripted to place an "ordinary" version of the book in the inventory that could subsequently be stored on a shelf properly. There are probably a good dozen books that behave in this way.
In the mean time I am still working my way through the books. I am well over half way though so not too much further to go.