Maybe one day there’ll be alternatives, you’ll be able to buy and own books and read them on devices like the Open Book:
https://itsfoss.com/open-book/
In the meantime I’ll be sticking with old paper books.
On the downside they take up a lot of space (but I guess that’s why we have public libraries, charity shops and second hand book shops.)
On the upside they have a great battery life.
https://pocketbook.cz/cs-cz/catalog/color-screen-cz/pocketbo...
https://pocketbook.cz/cs-cz/catalog/color-screen-cz/pocketbo...