Your browser should have bookmarks, watchlist. Alternatively if you don’t want to stray far from rss try “rsstodolist”.

Does it clock down when idle?

Obsidian, then do whatever you want with your markdown files.

That’s why you use 2 and have backup.

Keep the actual epubs and search in those? (You basically want a transcript of a read out book…which is the book itself.)

Don’t let it out onto the net…