Here are my two official book shelves. Behind some of the shelves are even more books (they are pretty deep), so the paper backs I am keeping are hidden. Since I went through and encased nearly every book that has a dust jacket into a protector, I went ahead and cleaned up the organization some.
First shelf is non-fiction starting with art, specific artists, design, history, technology, nature, and science. Second shelf is Star Wars, more Star Wars, Graphic Novels, Comics History, Comics, Classic Literature, humor, religion, misc.