We designed our BookBox system to help you build the bookcase of your dreams. At heart, the Levenger BookBox is a simple bookcase cube. But the soul of a BookBox is its versatility. Depending on how you stack and arrange the different pieces, they can be long units, tall units, collectibles cabinets with movable shelves, even room dividers. With our versatile BookBoxes, you will have custom bookcases better than built-ins, because you can rearrange them again and again.