LibraryThing is a new site for book lovers.It's basically two sites in one.

LibraryThing helps you to create a library-quality catalog of your books. You can do all of them or just what you're reading now. And because everyone catalogs online, they also catalog together. LibraryThing connects people based on the books they share.

Adding books to your catalog is also easy. Just enter some words from the title, the author or an ISBN number. You don't have to type everything in. LibraryThing gets all the right data from Amazon.com and over 45 libraries around the world, including the Library of Congress. Just click on the book to add it to your catalog.