This entire thing has been made needlessly complicated. Easy fix though.
- Get whatever ebook you want.
- Borrow some code from GitHub and teach a raspberry pi with a camera and a few servos to snap pictures of pages, turn the pages, snap again into a PDF.
- A script then parses all the images and OCRs them for the final PDF.
- You now own a backup of your DRM book, which you own forever. Pretty sure this is actually legal under DMCA since you are taking a backup of something you allegedly own. The encryption circumvention is irrelevant.
- now, break the law and throw the PDF on the internet to everyone. Go little bot! Go go go!