There are tons and tons of books in Skyrim and you can read and pickup many of them. If you occasionally read these books or simply want to improve the look and feel of them, you'll want the popular Book Covers Skyrim for Xbox One. (It's not available for PS4.)
This mod brings new textures to readable books, notes and journals. These textures make them look much better than the vanilla vesions.
Not only do you get unique covers you also get some new paper styles for the notes so that they don't look the same. And yes, Spell Tomes are also included.