Originally Posted by nrapallo
In future, once the experimental nature of PG .mobi and .epub offerings become more standard
, I can switch to using those as input instead of the HTML versions.
Originally Posted by AprilHare
Just idea off top of head: Gutenberg already produce (computer generated) EPUB files. Might it be possible to 'insert' a improved CSS sheet into these EPUB files to improve their viewability? Seemed more straightforward than regenerating a whole new EPUB file from source..
I had the same idea to use the Gutenberg epub as the input to GuteBook, but since, for the time being, GuteBook can only deal with a single input file (be it .html or .epub) it was easier to use .html and then regenerate all the other ebook formats, if and when required.
To just substitute a revised/improved CSS can easily be done manually via editing the .epub (it just a .zip file) and re-saving one's changes. The Guteberg .epub's unfortunately incorporate the same underlying problems with their included .html, that is, they also need to be "edited" to remove pages numbers, insert proper pagebreaks, strip PG legalese and copyright notices, ...
In that case, starting with just the .html is simpler and more useful.