The things we store on shelves aren't always worthy of prominent display. When you want to put items under cover, a roller shade will do the trick nicely. Pick a reverse-roll shade in a color or pattern that will compliment your decor, and have the merchant cut the shade to fit inside your bookcase. Use ceiling-mount brackets to install the shade on the underside of the shelf above. You can pull the shade down over one or several shelves at a time, depending on how many you want to hide.