I don't have any dedicated e-book readers (like Kindle).
That doesn't keep me from reading ebooks in Kindle format (which I believe is ".mobi")
I use my MacBook Pro 14" for e-reading. I've become a near-total convert.
For ebooks in .mobi or .epub, I use the free "Calibre" e-reader app.
For books in .pdf format, I read them in Preview (Apple's pdf reader).
For the "books" themselves, you can find older ones at the internet archive:
https://archive.orgOr (often much better), you can find almost any book you might want at:
z-lib.org
But don't GO to "z-lib.org". The webside
has been seized (by the feds, it says).
z-lib
is still there, however.
It's now harder to "get to".
You need the Tor browser. Free to download and use.
Open Tor and go here:
zlibrary24tuxziyiyfr7zd46ytefdqbqd2axkmxm4o5374ptpc52fad.onion
This takes you to the z-lib login.
You will need to create an account (email, username and password - I would recommend that you use an email account OTHER THAN your "normal" one. For a good alternate email, try protonmail.com [free]).
Once you do this, you can enter your credentials and will then have access to z-lib, as it "was before".
Save this info above for future reference.
Ain't it amazing that you can find out tricks here that you'd have a hard time discovering elsewhere?