WorldCat: The World's Largest Library Catalog
WorldCat is the world's largest network of library content and services. WorldCat.org lets you search the collections of libraries in your community and thousands more around the world. You can search for books, music CDs, videos, and many new kinds of digital content such as downloadable audiobooks. You may also find article citations with links to their full text; authoritative research materials, such as documents and photos of local or historic significance; and digital versions of rare items that aren't available to the public. Special features include the ability for you to create lists of library items and build biblilographies.