Goodreads

If you are into books and sharing your thoughts about them, whether that is by book reviews, lists, what you own, etc, then Goodreads may be a social network for you. I am on Goodreads and I am using it to catalogue my entire library (both hard copy and digital) – it will take me a while to complete the exercise. I use Goodreads and Shelfari – at the moment Goodreads is probably my preferred book sharing social network.

http://www.goodreads.com/