DISCLAIMER: Potterworld or Droobledore LLC is not in any way affiliated with Mojang AB, J.K. Rowling, Warner Brothers or any company, copyright or trademark.
I like to keep my books from classes and I either have to keep them in my inventory and take up space or spend gold after every class to move them to my bank vaults. Being able to access them without spending the gold to go to Grimlotts would be great and save me a lot of gold.