

I’ve definitely had trouble finding specific books. There’s a popular book about the local climate here which is only available in print. There is a copy uploaded to archive.org, somebody scaned the whole book in, but it’s unavailable for download or check out.
Have you checked archive.org? Or your local library systems?
Also, there are some books which don’t have audiobooks that I’ve wanted to listen to. The Microsoft edge browser has a read to me mode which is really good. If you can find a book in text form, you can sometimes listen to it that way. I’ve actually converted ePub files into text files just for this purpose.
Once they finally lock down the player so it’s impossible to block or skip ads, I look forward to coding a script which screen records each video on my sub list, feeds each video with ads into a purpose made classifier model which labels the ads, stitches out of ads with FFmpeg, and then uploads them to my jellyfin server.