[Atunah]

I am going to side load 3.8 to my older fire 8.9 to see. Should work fine I assume.

Doesn't seem to work. I can see the tab and click on it for audiobooks, but I can't select anything there is nothing there and it keeps telling me unable to retrieve categories etc.

It also keeps telling me to check my internet connection, which is on and fine.

I don't know what this version of fire is running, its the 2012 8.9 Hd model. So not ready for fires yet. At least not my old one.
I am sure they'll fix it soon though.

eta: To add, I can see the audiobooks that I already added in my library and it opens the player, but when I try to play it says problems with playback do you want to try again and if I try to download, it tells me about my connection again.
Those are the only audiobooks I can see, the ones already in my library, but I cant play them.