I just purchased a sort of plebian chromebook (Lenovo Flex 5i) on sale at Amazon. Installed many Linux apps (incl Calibre). Exceedingly simple instructions all over the internet ex:
https://www.techradar.com/how-to/how...our-chromebook
Instantly significantly improved the value of my Chromebook - in fact I don't even have to use the Chrome browser, phew! I use Firefox - much better privacy.