Is there a way to use this (or some other similar plugin) to identify epubs in my library that have images other
than the cover image (ie, disregarding the cover image entirely)? I just learned that the fan fiction downloader can be set to not compress images, so I've got a bit of updating to do and don't want to just re-download everything. There aren't a lot of epubs in my collection that have illustrations but they're well hidden in amongst those that don't.
I think I'll be able to hack a crude image count into the page count plugin for this one-time use, so no worries if there isn't. I'll probably learn a lot about writing Calibre plugins if I end up having to go that route.