WorldCat WorldCat is the world's largest library catalog, with over 1.5 billion items representating the collections of thousands of libraries worldwide. If you discover a book that you want through WorldCat, click the green "FindIt" button and complete the pre-populated interlibrary loan form with your name and 14-digit barcode from your ID card. Books borrowed from WorldCat generally take 7-14 days to arrive.
