BookKicker - Kicks your book every hour to your telegram
Goodreads - See what your friends are reading.
Book Video Club - Quick video summaries of the top business books for startups
LibraryThing - A home for your books.
Lybrum - The new way to experience books, together.
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes