I often convert downloaded ePubs to RTF so I can edit the book in MS Word and recently came across a book that neither MS Word (2010) nor LibreOffice (3.5) could open.
I then converted the ePub using another program (AVS Document Converter) and this created an RTF document which both Word and LibreOffice can open.
The ePub is attached, but the two RTF versions are too large to arrach to the post, so they have been uploaded to SkyDrive.
Generated by Calibre
and
Generated by AVS