It's not just that. E.g. Cooper and Hutchinson's edition of Plato's complete works, available on Kindle for $31.[1] Or on another tack, Yudkowski's recent If Anyone Builds It, Everyone Dies.[2] Neither book is on Unlimited, and I couldn't find either one on Kobo. I struck out half a dozen times in a row and finally gave up.

[1] https://www.amazon.com/gp/product/B00OZ4NMHU

[2] https://www.amazon.com/Anyone-Builds-Everyone-Dies-Superhuma...

He's considered the father of rationalism and the father of AI doomerism. He wrote this famous article in Time magazine a few years ago: https://time.com/6266923/ai-eliezer-yudkowsky-open-letter-no...

His book If Anyone Builds It, Everyone Dies comes out in a month: https://www.amazon.com/Anyone-Builds-Everyone-Dies-Superhuma...

You can find more info here: https://en.wikipedia.org/wiki/Eliezer_Yudkowsky

He is releasing a book https://www.amazon.com/Anyone-Builds-Everyone-Dies-Superhuma...