GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
Goodreads - See what your friends are reading.
Chaino - The social network where you connect with people, on your term.
Bookicious - Find the best new book to read with books collections for makers, founders and entrepreneurs.
PostedIn - A dynamic content marketplace