Library Thing

>> LibraryThing
Here’s a great site for book-lovers to share their favourite books and find other books they’re likely to enjoy. It’s easy to create an online catalogue of all the books in your collection (just enter the ISBN number) – You can then rate or review each book, and connect to other LibraryThing users who share your favourite writers or books, making it easy to get book recommendations from other readers with similar literary tastes.