Goodreads.com lets users create profiles, join discussions about literary controversies, write reviews and search for books based on a goodreads.com popularity index.
Shelfari.com has a virtual shelving system which allows users to categorize their bookshelves into their top-10, current-reading and wish lists.
Librarything.com instantly connects its members to those with the same bookshelves and literary interests.
Bookswellread.com provides members the option of classifying reviews and notes as public or private, as well as warning users of potential spoilers.
Whatsonmybookshelf.com If you’re looking to swap books, this site connects users with similar reading preferences and uses a book point system so members can trade.
