GoodBooks.io - Largest curated collection of 8,500+ book recommendations.
Blinkist - Key insights from 6,000+ bestselling books and podcasts
BookAuthority - BookAuthority collects the most recommended books on business, technology and science - as featured on CNN, Inc and Forbes
Instaread - Read or hear key takeaways of any book in minutes
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wits.io - Weekly book summaries recommended by founders and makers