I only want to use a specific "< d i v>" of the htmls to create epub, say, all the other part is useless.
Because each of the htmls is about 20k, and there are a lot of junk informations, scripts, ads, ...
All I need the "main-content" div:
<html>
....
<div id="main-content">
....
....
....
</div>
...
</html>
I know its xpath is :
//*[@id="main-content"]
How to use it in calibre or ebook-convert?