Executive summaries are part of the industry, where people boil down non-fiction books into short pieces of text. E.g. Blinkist (not affiliated, just the first result on Google)
It is somewhat funny that presumably a good amount of work goes into padding the book, and then work goes in on the other side to strip the padding away.
It is somewhat funny that presumably a good amount of work goes into padding the book, and then work goes in on the other side to strip the padding away.