Shelfari is a book centered social network where members can catalog, tag, review, and discuss books. With Shelfari, you can create virtual bookshelves of books you have read, plan to read and currently own. Your bookshelf is literally a shelf that allows visitors to browse through your book collection. You can search for books by title, author, ISBN and subject, or import a text file from services like Delicious Library or LibraryThing. You can sign up for free and register an unlimited number of books.
Shelfari has a simple interface with some great features and the best of social networking, Also, Shelfari comes with a Shelfari widget with a sleek look and simple interface. The Shelfari widget works on most blogs and social networks, including Blogger, Typepad, Xanga, and Vox. I like Shelfari and think it is a great tool for teachers and librarians. They can use Shelfari to share books with their students and colleagues as well as post the new book collection in their library.