How do you store the physical books that you have?

I have 3 bookcases in the spare bedroom. My hubby now refers to that room as the library. I have my books arranged by author to make it easier to find books that I’m looking for. It makes sense to me because that’s the way the books are arranged at my local bookstore. Since that’s the way I am use to finding them at the bookstore, then I figured that would be a good way to arrange them at home.

I do have a Kindle Fire (as of last year) so that has helped me keep the bookcases from getting overwhelmed with books. There are some books that I can live with having on my Kindle and then there are some books that I have to have the physical copy of.