The best alternatives to Biblo are Swappy Books, Bookup, and bookpo.st. If these 3 options don't work for you, we've listed a few more alternatives below.
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A book based social network that lets you find great recommendations from like minded readers, and swap books with them for no fee. We match people by their book taste, allowing them to message, and find that next great read. Launching a virtual book club next
Bookey is an app that lets you meet new people in your community through book swaps. It uses a magical algorithm to match you with people who are local to you. A match occurs if you like someone's book and they like one of yours.