Book-themed social networks and digital groups are growing more popular, letting participants share good books, discuss great stories, and review the latest bestsellers. Here are six great book-centered social networks for avid readers to check out. Goodreads lets you build a list of your books, rate and review books, and find out what your friends are reading. Community features include a huge variety of groups to participate in, as well as discussions and an Ask the Author feature. There’s a huge array of groups to join and discussion forums to participate in, with an active, engaged community. Social features include community forums, testimonials, recommendations, and more. The site’s social aspects include in-depth and passionate discussions of books as well as recommendations. Since everything is book-centered, you can find all posts concerning a book by searching on the title. There’s a discussion forum with a plethora of topics to participate in, making this a great social site both online and offline. Its Bookshelves feature lets you store, track, and share the books you want to read, and book and reading forums have hundreds of thousands of welcoming members.