What's the Adverb for Reading?

Luke's books on his shelves are organized by color which is fine. What's wrong with it for me is that when you want to find a book you've got to know what color it is Whereas in my house the books are arranged alphabetically by author and then that's subdivided into categories. But yeah so maybe I should mix it up a bit now. Maybe I should go for alphabetical order but the problem is that some of these shelves are have more space in them than others. It clearly proves that he is not okay. For the person who asked if he was okay the answer is no because of the color of his face whether it's too green or too red.