Quote:
Originally Posted by Ashjuk
That was my thinking, but I thought I would ask to see if anyone knew definitively whether this was the case.
The next step I suppose will be to try editing the toc.ncx file of a book that does not work to see what happens.
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It is a combination of what @phillipgessert and @theducks. The Kobo devices use both the internal files and the ToC for the chapter page counts. If you have multiple internal files without a ToC, then the page count will get restarted at the beginning of each file (though I haven't tested this recently so it might have changed). And the chapter page count is also started at whereever a ToC entry points. Overall, it works best with a one-to-one mapping between the internal files and the ToC. But, multiple ToC entries per file is fine. I just wouldn't recommend having an internal file without a ToC entry pointing to the start of it.
And of course, this isn't a Sigil question. How to create the above would be, but, how epubs work and how a particular device works should be elsewhere.