

Readarr is just a tool that facilitates downloading via bittorrent or usenet. You can just use those the old fashioned way without it.
Edit: The program Lazy Librarian that some people are mentioning also assists with the searching and downloading, if you prefer not to do it by hand.
You can purchase audiobooks too, especially from authors who make them available on DRM-free platforms.
And there’s always https://librivox.org/
yes that is correct. it is a server/client solution so you can track you progress.
zero finding ability. try Lazy Librarian.
remember that audiobooks are relatively rare due to their high production costs. so a lot of books do not have an audio version. Could consider text to speech.
there are some massive torrents that have like thousands of audiobooks in them and you have to go and select which ones to download. I’m not sure how I stumbled on these in the past so if you figure that out let me know.