Social Shelves from Kumbooka, allows users to catalog books, movies, music and more by simply scanning a barcode or typing some keywords. Create a catalog of the stuff you own, or the stuff you want. Social Shelves automatically creates the right sub-categories within your catalog as you add your stuff. Connect with friends to discover the stuff they own or want, ask questions about an item, or even borrow or lend between friends. Social Shelves is much more than just another catalog.