Bookstash - Bookstash is a free library of curated summaries from top nonfiction books.
Blinkist - Key insights from 6,000+ bestselling books and podcasts
Book Video Club - Quick video summaries of the top business books for startups
Instaread - Read or hear key takeaways of any book in minutes
12min APP - Free reading app for summaries of nonfiction books.
wits.io - Weekly book summaries recommended by founders and makers