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jhowell · 10-23-2023, 10:04 AM

The .azw9.res file extension is used for KFX resource files downloaded using either Kindle for iOS or the new Kindle for Mac app. That file contains only part of the content of the book.

You can try installing the KFX Input plugin for calibre and importing the main book file, the one with a .azw8 extension. However that may not work since as far as I know the DRM removal plugin available for calibre does not support files downloaded using those apps.

For ideas about other ways to obtain a usable copy of your book see the threads:
Amazon and DRM changes
Dealing with Kindle for PC/Mac 1.19 (and later) and KFX in calibre.

10-23-2023, 10:04 AM	#2
jhowell Grand Sorcerer Posts: 7,104 Karma: 92190133 Join Date: Nov 2011 Location: Charlottesville, VA Device: Kindles	The .azw9.res file extension is used for KFX resource files downloaded using either Kindle for iOS or the new Kindle for Mac app. That file contains only part of the content of the book. You can try installing the KFX Input plugin for calibre and importing the main book file, the one with a .azw8 extension. However that may not work since as far as I know the DRM removal plugin available for calibre does not support files downloaded using those apps. For ideas about other ways to obtain a usable copy of your book see the threads: Amazon and DRM changes Dealing with Kindle for PC/Mac 1.19 (and later) and KFX in calibre. Last edited by jhowell; 10-23-2023 at 10:08 AM.