I do a epub test with:
<p class="msonormal"><a href="el_mago.epub" class="pcalibre1 pcalibre">El mago de Oz</a></p>
I opened with extension for chrom EPUB READER.
With inspector I see:
chrome-extension://jhhclmfgfllimlhabjkgkeebkbiadflb/el_mago.epub
Can you think of any way so that I can open the workbook that is locally?