size is a good indicator, but not reliable enough.
looking at the filenames by browsing on the kindle, samples seem to have _EBSP-v_0.azw in the file name.
is there any way of searching on the file name? or extracting it to a custom column?
i am fairly new to calibre, and still finding may way round.
i could probably hack an existing bit of code if it was similar to what i need, but am not up to writing my own yet!
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