Jonti-Craft's Mobile Library Bookcase lets you display all of your children's books, magazines and activity workbooks without taking up valuable floor space. This sturdy birch bookcase is easy to roll on four swiveling casters, and it folds flat to provide space-saving storage. Plus, it's the perfect size for young readers to see and reach all of their favorite books. Elastic cords hold your books firmly in place. Choose your mobile bookcase as a two-section unit with 16 shelves or a four-section unit with 32 shelves. Covered by a lifetime warranty.