I have seent that in my searches [ https://github.com/naleo/audiobookshelf.koplugin ], but I decided to go for something that has it natively since sometimes the plugins get björked by updates (from my experience with gnome and its plugins)

But I will say, Audiobookshelf is superior for its purpose: audiobooks and podcasts. If I wanted that first I’d slap the plugin on to be happy with books/comics and kobos, but I wanted book/comics first so I chose a diff path - abs ain’t bad!