Tertulia - Books Worth Talking About.
GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Reese’s Book Club - Every book, everyone’s invited
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes
Bookstash - Bookstash is a free library of curated summaries from top nonfiction books.
Goodreads - See what your friends are reading.