Quote:
Originally Posted by odamizu
The fact that calibre automatically uses a “fake” EBOK tag when converting ebooks to AZW3 is a calibre issue, which seems a not insurmountable problem for a willing developer.
The fact that users expect Amazon to leave their “fake” EBOKs alone seems, quite frankly, unreasonable, since Amazon provides the PDOC tag specifically for personal documents, including diddled Amazon purchases, which they leave alone.
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This certainly seems like the bottom line to me. If Calibre is purposefully setting a tag that causes Amazon to apply syncing behaviour -- which includes book deletions in some cases as a normal and correct part of syncing -- then the solution is for Calibre to not set that tag (or at least to give you an option of whether you want the tag to be set).
This strikes me as more of a cleanup procedure than any kind of security measure, i.e. when you connect the Wi-Fi after a long break, Amazon sees that you have non-sideloaded (according to the EBOK tag, which sideloaded books should not have) books on your device that are not present on your other devices, so Amazon cleans up your device by removing the "outdated" files for you, as a normal part of syncing to ensure all your Kindles have the same books on them.