One library's solution

I visited the Scottsbluff Public Library in Scottsbluff, NE on Monday and I loved their solution to the Dewey "problem". To them, it just seemed like the right thing to do and have been doing it for years. I was told the public love it. (They also do something similar in fiction.)

If interested in doing this in your library, you can order them(well, a close version anyway) from DEMCO. They're called "DEMCO® Sturdy Colored Shelf Markers". Sorry, their site doesn't allow for linking directly to a product's page. (Hey Demco, fix that, I'm trying to sell some of your stuff here and you're not making it easy.)