Don’t throw away your Kindle, Jailbreak it and take back ownership. Make your Kindle even better with KoReader and other apps. If you wanna see whats possible i recomment this Yt video. If you wanna get started here are all instructions: https://kindlemodding.org/ Don’t let it scare you it seems complicated but its just a lot of (easy) steps. So definitely possible in <2h.
When I look for a specific book, I usually find that simply searching for "BOOK NAME purchase DRM free” results in plenty of results.
Sadly, I find it dramatically easier to find a free DRM free copy of most eBooks than to find somewhere to legally purchase a paid licensed DRM-free copy.
As a flawless upstanding citizen, I never partake of such amazing convenience, myself, of course.