The important change is that LCP DRM is no longer supported [0] (git history was rewritten):<p>> Support for LCP DRM removal was included in the past, but Readium (the company who developed that particular DRM) has decided to [open a DMCA takedown request](<a href="https://github.com/github/dmca/blob/master/2022/01/2022-01-04-readium.md" rel="nofollow">https://github.com/github/dmca/blob/master/2022/01/2022-01-0...</a>) in January 2022. This means that for legal reasons, this GitHub repository no longer contains the code needed to remove DRM from LCP-encrypted books.<p>(Quote from the FAQ)<p>[0]: <a href="https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md#why-dont-the-tools-work-with-lcp-encrypted-ebooks--error-message-about-a-dmca-takedown" rel="nofollow">https://github.com/noDRM/DeDRM_tools/blob/master/FAQs.md#why...</a><p>This is the file that was removed: <a href="https://cloudflare-ipfs.com/ipfs/QmVoHkQ7AYMprL9eMtDQUa7zgGzgBaGcJbSVzwTwbdbm1x/lcpdedrm.py" rel="nofollow">https://cloudflare-ipfs.com/ipfs/QmVoHkQ7AYMprL9eMtDQUa7zgGz...</a>