Quote:
Originally Posted by JSWolf
What I do is unzip the ePub, and then make the changes and put back just the files that I've changed. Works quite easily.
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If the mimetype file is not the first file and/or is not uncompressed, your epub might not work in all epub-supporting software. Calibre, ADE and Sigil can still handle this, but your epub is still non-conformant and may not work elsewhere.