I like audible for specific general audio courses, this is great for win, but for me everything makes time and sense on the go i.e. commuting most of the time so mobile. For that @voice aloud tts (paid once but worth it for me) + custom language addon (smooth native lang specific)+ epubs/mobi/pdfs/web downloads from gutenberg or others opds catalogs or any on the net. That reads almost anything. The pc can have the tons of audio book torrents. Don't ask me if I got to listen to any of those but it is a todo list 🤣