@AlanHK - Assuming the epub is not ridiculously large and your client knows how to unpack a zip archive on his/her Mac, why not send two files, 'whatever.epub' and 'what's-in-whatever.zip'. The fact that the second is a rebadged copy of the first is hardly likely to be here or there. It would also deter your client from tinkering with the epub - a'la Hitch's recent 'Anyone here ever seen..." thread.
You could even remove the components that make it an epub -- mimetype, opf etc --- from the zip.
BR
Last edited by BetterRed; 05-05-2016 at 09:18 PM.
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