Quote:
Originally Posted by theducks
Jon Jon
Half my purchased EPUB were created with Calibre in the work flow.
The ones I see without tend to be from some BPH.
So even if there were Calibre footprints. Read the timestamps . Those may give a clue if they appear to be from Before the purchase/import
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You didn't fully read my post. I did say checking for the lack of Calibre in the OPF is not fully going to work. But it will work in some cases which will help for those eBook where ePub is the source and Calibre was not used.