[pittendrigh]

Yes epub is zipped HTML but as it stands it cannot be directly viewed with a browser. You have to download a file and then look at with a reader that is an executable application on your device.

epub(3) can be displayed on a webserver so it looks like a book, so it can be viewed with a browser that DOES NOT have any extensions installed, so it CAN be embedded inside a surrounding CMS. But to do so you have to write your own server-side software. I expect that to change. This is a niche market too rich to ignore. Epub on the webserver will be extremely valuable for online courses, as a supplement to softwares like moodle and desiretolearn etc.

The sigil problem was apparently user error on my part. I copied lots of images...with subdirectories and pdf files, text file resources. and even a few autocad files etc...into the file system area sigil was using. Why not? It's just an editor? The final epub seemed like that's all that counts.

This did not cause a problem with Jutoh. It was trouble with Sigil. However, once I "compiled" my jutoh file and saved a month's editing as an epub, that supsequent epub loads into sigil just fine. Sigil for me (with a well-formatted epub that only needs a bit of editing) is slower than Jutoh but eminently usable. And I do much prefer the sigil GUI> I will likely switch back to sigil now.

I got what I had by using wget to suck down a ten year old website, and then by running scripts on the HTML so it could be pasted into sigil. Somehow my recursive file copying into the files sigil used caused it to have indigestion (but not so for Jutoh).

I re-imported the epub that came from Jutoh as a new sigil project and it edits just fine. I'll take a powder now.