You can open any EPUB file (even with DRMs, they are zip files with a different extension) with 7-Zip or WinRar, edit all the css files (normally not DRM encrypted), searching for font-family attributes. You just have to remove these up to the following ; (included) or } (NOT INCLUDED) character and save each modified file back into the archive.
Think to edit a copy of the books.
However, some books can have style embedded in the same files as the book's text and if they are DRM encrypted, you can't change those without removing the DRMs first.
Last edited by seabee; 11-22-2011 at 08:33 AM.
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