It might be possible to import/open EPUB ebook to QuarkXPress and save it in its default QXD format.
Convert Open Publication structure eBook to QuarkXPress document.
We have found 2 software records in our database eligible for .epub to .qxd file format conversion.
Microsoft Windows software - convert epub to qxd on Windows
A design software used to create rich documents for web or print
Convert from epub file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned epub to qxd. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert epub to qxd on OS X
Software fro document design and publishing