GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Literal - Track your reading and discover your next favourite book
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes
Bookling - Track your reading habits and set goals
Most Recommended Books - Books recommended by the world's most successful people
Readup - Track and improve your online reading habits.