No rush! Whenever you get around to it. :3

 I should read the first handful of stories. I've only been through the  Omen of the Stars. But even then, they don't have the last two books in audio format.   I had to go through them with my iPad reading them. It was rather hard to understand some of the cats names. Ha ha! I don't think they had any of the other books on audio, but I might have to check again.  If nothing else, I can always look in iBooks.  It's good to know that the later Siri's weren't all that great. Thanks for the heads up.