So I caved and bought some books from Kyobo that were definitely not on thé usual channels and they have them in such a way that you can only read them from the app. So I downloaded them to my phone using the mobile app (the app doesn’t support Linux and is basically a Rootkit anyway) and copied the files from Android/data. They’re OEBPS by structure but come in regular folders, is it feasible to just zip them and import to Calibre?

Edit: I found a Calibre plugin for the DRM itself, so it’s more “How to make this folder a file”

Edit: so you can just zip them up and import as epub BUT the DRM plugin only goes as far as the metadata, the content itself shows up garbled. Don’t know how to get around that one…