Ever wish you had your own personal librarian for your book collection? Your wish is LibraryThing's command. A book catalog that will categorize your books for you, all you need is the time to type in all the titles or ISBNs of the books filling your home. You can list up to 200 books for free or, by purchasing a yearly or lifetime membership, you can enter in as many books as you please. You can discuss books with other bibliophiles or you can skim through different collections for ideas on what you should read next... like you don't already own 50 books that you still need to read.