@Question Mark: I have had the same experience as you. Epub to kepub mostly downsizes it. Maybe because of the reason @rashkae has mentioned. And it was working on the old one without any issue.
@rashkae: Maybe you are right. I've never been bothered by the image quality as kepub offers the choice to double click on the image to zoom. But as you mentioned, the file reduction might be because of it and the issue here can not have been caused by it.
@davidfor: I think you might have just hit it on the head. Being a textbook, it does have a lot of TOC. I believe book 1 had 50 pages in TOC. I'll try to check the trace logs. How do I open these log files you've mentioned?
I'm adding the link to the actual book download site. I believe there is some device limit for the books but as far as I know, there doesn't seem to be any drm involved. If you want me to send you a copy of the book, let me know. Or we can also try some other torrent/pirate site to study this issue. But I'm not sure what your stance on the latter is, so let me know what you most comfortable with.
Regarding the plugin, I believe you must be right. I remember setting everything up in the beginning, but after the initial setup I just don't remember which is which.
http://www.ciscopress.com/store/ccna...-9780134441009
http://www.ciscopress.com/store/ccen...-9780134440972