I would prefer people didn't use my BoV book textures for other books, because I would like them to remain unique in the game. You can modify them however you like and use them as bases for other books, but if you're going to release it as a new mod, I would prefer them to be significantly altered.
If you would like me to make a new book texture for you, you can specify what you would like it to look like and I can come up with something. Let me know what base book mesh you want to use as well.
Here's some elements to consider:
Base color
Base texture (leather, cloth etc.)
Ornamentation (gold leaf, hinges, metal studs etc.)
Imagery (if any - even a small picture of what you want will work)
Text (font, size, color etc.)
Open/Closed (one or the other or both)
Interior Illustration (if open)
Age (if you want the book to look new, ancient, dog-eared etc.)
I like making book covers. Request away!