Goodreads
http://www.goodreads.com/

“If we encountered a man of rare intellect,” Ralph Waldo Emerson once wrote, “we should ask him what books he read.” As a group of avid readers, educators, librarians, and computer scientists, we take those words to heart when deciding which book to dive into next. Fortunately, it’s now possible to find out what people of all sorts are reading, and maybe recommend a few yourself, via the innovative interface of Goodreads. Search for a book’s title to find out what others have
thought of it; follow your friends to see what they’re reading; keep track of the books you’ve finished; and contribute your own reviews and ratings to the site. A simple star rating system, easy-to-use tags, and the option to write an in-depth review make this website a fantastic way  to organize your reading list and remember the key details of books of years past. Goodreads is not only a fine place to find your next “good read,” but also a great way to keep track of books you’ve enjoyed. Visitors can log in to create their own lists of books, along with annotations, comments, and ratings. Additionally, visitors can search and browse other readers’ profiles, take literary quizzes, and look over  hundreds of book lists. Author pages collect writers’ bibliographies for an easy way to find more books based on those already read. Finally,  the Recommendations area suggests more books individual users might enjoy, drawing from their ratings, tags, and virtual “shelves.”  This has been added to Research Resources Subject Tracer™ Information Blog. From The Scout Report, Copyright Internet Scout 2013. http://scout.wisc.edu/