What is your take on social books? I'd love for librarians and library related vendors to chime into this discussion. I think we have something to add!
What about this to start? I'd say this is the ultimate social reading tool for libraries: LibraryThing for Libraries offers reviews in the catalog. Person searches for a book at a library, can check out user generated reviews and contribute their own:
(for example: 1745 reviews! goo.gl)