Anyway, I've downloaded these 2 books (The Prometheus Deception by Robert Ludlum and The Doomsday Conspiracy by Sidney Sheldon), but they downloaded and they are in a file format called .aa.

OK, I'm not exactly sure whether I should post this since, I guess, it borders a little on piracy type stuff. But, I was finally successful in taking a .aa file to .wav to .mp3. No more stupid ...