Audiobooks

[Sian Mountbatten <poenikatu@fastmail.co.uk>]

I received a DVD from Amazon which came with a slip of paper saying
   Download 1 FREE AUDIOBOOK
I went to the site, signed up for 30 days free membership, selected a 
book and downloaded two files of type .aa. I noticed that the only 
software available was for Windoze or MacOS. So is there a package which
will play an audiobook. A search with apt-cache gives yatm, but, after
installing it, I tried it one of the files and it merely produced 
horrible sounds. Certainly nothing intelligible.

So are audiobooks only for Windoze or MacOS? Has anybody any suggestions?
--
Sian Mountbatten
Algol 68 specialist