This is a libepub based backend to watch epub books using okular The epub library can be obtained using:
svn co https://ebook-tools.svn.sourceforge.net/svnroot/ebook-tools/trunk ebook-tools
The library uses standard cmake (ccmake .;make install)
The epub standard specs can be found in:
www.idpf.org/specs.htm">http://www.idpf.org/specs.htm