Quote:
Originally Posted by Tomifonication
Thanks for your reply. To give you a rundown:
1. Using the latest version of Kindle for Mac, I download a Kindle book. I find its AZW in Finder and drag and drop it into Calibre.
2. After a few moments, the DRM appears to be stripped, and I'm left with a KFX file that I can edit the metadata of.
3. I edit the cover and the book description.
4. I make sure the original Kindle copy is deleted from my Oasis
5. I drag and drop the copy from Calibre onto the Oasis
After, though, the book I've now manually added to the Oasis retains the original cover and information from the eBook purchase, despite having removed the copy from the Kindle.
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In those steps I didn't see anything that would actually apply the metadata you changed in the calibre database to the KFX format copy of the book. That only occurs when you use certain specific functions in calibre: "Embed metadata", "Save to disk" (with the "Update metadata in saved copies" option enabled), or "Send to device".
Unless you did one of those things the book in KFX format will retain its original metadata.
Quote:
Originally Posted by Tomifonication
Alternatively, am I wasting time trying to get the best out of KFX? Effectively I want to archive my Kindle purchases; I'm using KFX as it seemed the most sensible way to do that, given its the current standard.
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KFX format enables extra features and so I recommend it for the best reading experience on Kindle devices. But it is highly processed and very proprietary to Amazon.
For archival of books I recommend KF8 (azw3) format. That is the closest to what was originally provided to Amazon by the publisher and is more future-proof than KFX.