Bookcases are something that I am always studying, how are the books arranged, what books are on the shelves, is there breathing room for the books and are objects arranged with the books. We are working on editing our books and contemplating the arrangement of the books.
Currently we have some black boxes like those on the upper two shelves containing some of the books. This way you do not get all the different colors from the spines.
I like the different numbers and letters on the shelves; from cut out shapes to printed on paper to glazed on ceramics. The books are treated as pieces of art on next to the top shelf. Most of the books are lying down and the art is standing.
The orange boxes at the end of every other shelf lends a sense of order to the shelves.