Literature

Description from Web100.com
An extensive social database for book lovers, Goodreads allows users to discuss new book finds and discover recommendations through a network of fellow bookworms.

Description from Tech Radar
Enjoyed a particular book or writer and want to find something similar? This site will recommend a good follow-up read for you to get your teeth into. Its suggestions rely on the magic of user-generated content, and the site isn't in the pocket of any publishing houses, so you should get a fairly unbiased recommendation.