I've noticed that all the sample books on my Kindle are generating the message "These books on the Kindle cannot appear in any collections on the Kindle because the book information is not set correctly."
I've tried resending them from Calibre but this makes no difference. I see there is information about needing to change the cdetype, but I dont see how to go about doing this. Will I need to convert these samples using Calibre, in order to use Calibre to add them to collections? I've managed to add them to collections using the Kindle.
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