Is there a way to filter out books that came particularly from Amazon. That is, specifically the books I bought on amazon and imported. I'm guessing a first step could be to filter out the possible formats like azw3, mobi, and azw4, etc...but, for me, much of my Calibre library contains converted azw3 or mobi books of some sort (i.e. non-retail). A lot of these converted books probably weren't converted by Calibre either. In addition, there are other miscellaneous book formats that could be mixed in.
Is there any "tag" amazon puts on books like the Adobe meta tag? I know the Quality Check plugin works well for filtering out retail EPUBs, but this only works for EPUBs (not even MOBIs, I think?)... but I was wondering if this kind of "quality checking" could be done for Amazon books.
Is there any "tag" amazon puts on books like the Adobe meta tag? I know the Quality Check plugin works well for filtering out retail EPUBs, but this only works for EPUBs (not even MOBIs, I think?)... but I was wondering if this kind of "quality checking" could be done for Amazon books.