What are some alternatives?
When comparing GetAbstract.com and Four Minute Books, you can also consider the following products
Blinkist - Key insights from 2,000+ bestselling nonfiction books
Book Summaries - Great books summarized in 5 quotes (or less) so you can get the main idea fast.
Instaread - Read or hear key takeaways of any book in minutes
12min APP - Free reading app for summaries of nonfiction books.
BookRags - Apart from book abstracts, Bookrags.
Resoomer - Resoomer is a software and online tool for text summary: it allows you to summarize and analyze your articles by taking up the important concepts