If you consider yourself a book lover, than LitRate might be an internet community you would be interested in. Currently seeking financing via crowdfunding platform Kickstarter, this social media and online cataloging site is built by bookworms for bookworms.
LitRate would allow you to search for books to add to your own virtual library. This lets you share what you're currently reading, what books you've already read and which ones you're looking forward to reading. You can rate books and leave reviews for others in the book lover community. In addition to having friends like any other online social network, there is also a gamification component where you can unlock achievements and gain virtual rewards.