Originally Posted by charlie94
Ok, so in theory (networking geek hat going on) if I had html/htm and wanted to drop not only the htm file but the folder with all the images in it as a zip file, into Calibre I could?
You don't have to separately grab the folder. If you drag the html file only, Calibre will automatically grab the contents of the associated folder, with all of its images, and put it all into the zip file. You can also add a zip file directly, with an ebook inside. Calibre will open it and add the book that's inside. Finally, you can add a zip or rar file with anything inside. Calibre will open it, but if it doesn't see an ebook, it will just add the zip/rar.