I don't know if it still works, but the last time I checked it was possible to un-DRM (de-DRM?), and convert amazon format to normal epub, and read it everywhere
Depends on which version of the DRM. KFX hasn’t been broken yet. It’s been a bit of a cat-and-mouse game where the DeDRM people make some progress then Amazon tweaks something and they have to start over. There are some workarounds that involve getting Amazon to give you an older version of the file, but then you lose the typography improvements present in later versions of Amazon’s ebook format.
