Dream Book Critic Reviews aggregates critic reviews of books to help you discover new books. They are the Rotten Tomatoes of the publishing world. You can search by title or author, or view books by genre.
A score appears underneath each book cover, and they only recommend books with an aggregated score of over 70%.
You can also find giveaways at Dream Book Critic Reviews.
Sound like a site you would enjoy? It is currently under invite only. You can visit them at http://idre.am Use the access code: "discover_books" to browse through their books. You can also apply to become a book critic.