Shelfari vs weRead
Shelfari is a community-powered encyclopedia for book lovers. Create a virtual bookshelf, discover new books, connect with friends and learn more about your favorite books – all for free. See what your friends are reading. Create virtual bookshelves for your books to keep track of what you've read. Discuss your favorite books in a book club.
weRead is the largest, most popular book application. List, rate and review books you are reading or have read in the past. Browse what other readers are reading. Get personalized recommendations for new books and authors. Find people with similar interests and add them as friends.