What happens to me specifically is that when I find the file with my browser, the browser itself can't read podBooks. And if I try to download it, the browser doesn't know which app to use.

It won't download into the music player. It won't add itself to iBooks or podcasts. Sometimes this is because it is a zip file, but even when it is not, I've has it fail.

I would specifically like to know if anyone has an app at lets one download from the audiofic archive.
Thanks.