: Use an older version of the Kindle for PC app (typically v1.17 or v1.23 ). Newer versions of the app automatically download books in the KFX format, which is much harder to decrypt.
To successfully remove DRM using this setup, users typically follow these stages:
Removing from Kindle books allows readers to back up their purchases and read them on non-Amazon devices. The specific version combination of Calibre 4.23 and various Kindle for PC versions is a well-known "golden setup" for bypassing Amazon's tougher KFX encryption. Why Calibre 4.23?