WorldCat lets you search the collections of libraries in your community and thousands more around the world for books, music CDs, and videos. If you find something you want, our Documents on Demand office can order it for you.
HathiTrust is a partnership of academic & research institutions, offering a collection of millions of titles digitized from libraries around the world.
"A non-profit digital library offering free universal access to books, periodical articles, movies and music, as well as 150 billion archived web pages."