For instance, consider the book, Presence: Bringing Your Boldest Self to Your Biggest Challenges, by Amy Cuddy, 352 pages, £8.99 in the UK (about $12) and, unusually, more for the Kindle version (£9.99). Its ranking is 2,237 in books.
One summary version is by "Ant Hive Media," 30 pages. The price is £4.89 (about $6). Its ranking is 95,072.
The other is by "Instaread"and says it includes analysis, but still comes in at only 34 pages, for £5.23 for the paperback. Its ranking is 342,857.
I guess summary books could be useful for someone wanting to save time, but I can't help feeling they're feeding on somebody else's the hard. Shouldn't a percentage of the proceeds go to the original author?