@kde for your information, the application is not accessible enough with screenreaders that one can use it for reading books. First off, if you tab past the list with your books, you get into a dialog, I assume search, out of which you can't get unless you press escape, you can't even tab in it. Then, and that's probably because of flatpak portals being dumb accessibility wise, I can't select an epub file for viewing, because the listing is entirely inaccessible.