(bookshelfporn.com)
Do you like to look at images of books? Old books, new books, books on shelves. Cool book shelves. Full book shelves. Empty book shelves. This site has everything!
LibraryThing (www.librarything.com)
For those of you who want to make a list of all the books you’ve read or owned, this is the site. You can search your book titles with an Amazon.com search engine, then create your own library catalog. You can enter notes, review books, and even win free copies of upcoming releases. Once you enter a few of your favorite books, LibraryThing can give you recommendations on other books you would like. You can compare your library with other user’s libraries. It’s a networking site for books! (Entering the first 200 books is free. To enter more, the site requires a one-time donation.)
GoodReads
Shelfari
Unshelved (http://www.unshelved.com/)
Full of library and book humor. You wouldn’t like it. Plus, every Friday they review a book in comic form.
Book Games
(http://www.lapl.org/ya/game/)
One of the best designed library websites for teens (jeez if we only had THAT kind of money), the Los Angeles Public Library Teen Web has a whole virtual library you can enter, solve puzzles and play library-themed games.