All copyrighted material, I don't have links to the actual works, but some books that come to mind that I would have enjoyed much more if their were 20% of pages:

- The courage to be disliked (Ichiro Kishimi)

- The simple path to wealth (J.L. Collins)

- Peak (K Anders Ericsson)

- Happiness (Matthieu Ricard)

- Clean Code (Robert C Martin)

Not that they'd be the particular books OP wants, but if you're looking to summarize large content, perhaps grab it from Project Gutenberg? https://www.gutenberg.org/