https://blog.pixelmelt.dev/kindle-web-drm/
https://www.reddit.com/r/programming/comments/1o8ob82/bypassing_amazons_kindle_web_drm_because_their/
https://www.reddit.com/r/ReverseEngineering/comments/1o8udje/bypassing_amazons_kindle_web_drm_because_their/?
Bypassing Amazon's Kindle Web DRM Because Their App Sucked

https://github.com/transitive-bullshit/kindle-ai-export/issues/17
kindle web DRM has been cracked