Library feature for bookcases

The basic idea is:

 -   Store enchanted books in bookcases

 -   Place bookcases next to each other to form 'Library' (maybe have this expand how many books fit in       a case, like doubling a chest)

 -   Allow player to 'use' their Library which would allow you to filter and locate specific books. 

This would help when you have chests and chests full of enchanted books and want to find specific ones that will combine, or which ones are useful / useless and ready for grindstone, or to find that specific book you need.   It gets hard when you get a lot of books from fishing / resetting enchanting table etc, so to hover over each one individually and remember what you've already seen is crazy. 

Also, even if as a player if you try to be organised with this, and create separate chests for each weapon / type of enchantment, there are many books which overlap on categories / weapons/power levels etc, so its literally impossible to accurately place them in a sensible way right now to allow the player to actually use them properly. 

It would also make a nice feature for multiplayer i believe, if you were selling books on your server, for players to be able to search / filter for what they need at your store counter with shelves in the back all connected. it could be fun. 

I'd suggest obvious filters like by weapon or armour piece, but also allow the user to search by level of enchantment, or even by name / word input?