[DoctorOhh]

Originally Posted by anthony_barker

This is a very useful series of posts

So it looks like the _best_ options are for PDFs

1) Mobipocket/Calibre
PDF->html->PRC->epub
https://wiki.mobileread.com/wiki/MobiPocket_Creator
https://wiki.mobileread.com/wiki/Calibre

Does this work better than simply opening the HTML directly in Sigil?
and/Or cleaning the html prior to Sigil?

Personally when I have to go outside Calibre, I usually try Mobipocket Creator for this part:
PDF->html

And then back to Calibre for this part:
html->epub

Then I use Sigil for any fine tuning.

I don't think the PRC step helps since the first thing calibre does during conversion is change the file back to html.

My main goal is avoiding PDF as a source document whenever possible.