Bookstash - Bookstash is a free library of curated summaries from top nonfiction books.
BookKicker - Kicks your book every hour to your telegram
Book Video Club - Quick video summaries of the top business books for startups
Instaread - Read or hear key takeaways of any book in minutes
Lybrum - The new way to experience books, together.
wits.io - Weekly book summaries recommended by founders and makers