This Product Ships Free. This updated version of our best-selling corner bookcase is as sturdily constructed as its predecessor but now has added function. The Cubi Corner File Bookcase works beautifully as a standalone organizer on your desk or makes a versatile addition to an existing modular Cubi desk configuration. It can be used either horizontally as a mini bookcase with one stand-up slot for files or a binder, or vertically to store files as an inbox. Add an optional Cubi Drawer (available separately) for even more storage when you use it vertically.