Goodreads - See what your friends are reading.
Book Flee - Compare prices of books from iTunes and Amazon easily.
GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Savings.com - Compare prices at local stores & discover the best deals
Bookicious - Find the best new book to read with books collections for makers, founders and entrepreneurs.
bbboookkksss - An super simple way to find great books at low prices