It’s probably appropriate to think of Goodreads.com as Amazon’s social network. It doubled in size in 2012 and it did so again in 2013 according to a a blog post on the site.

Goodreads is now up to 25m members from a base of 6.5m in 2011. The infographic shows that every second 4 books were found on Goodreads and that the site now has 29 million book reviews. The most popular book of 2013 was Dan Brown’s Inferno and that matches with Amazon’s best seller list.

The most popular quote from the site comes from Clockwork Princess by Cassandra Clare;

Life is a book and there are a thousand pages I have not yet read.