Emperor Mage: The Immortals: Book 3

The reader for Full Cast has kind of a stilted delivery that I find dumbs the book down. The character actors are all really great, and this series shows a lot of development for Pierce since the Lioness books.

Hey, Audible, there's a fourth book in this series. What's up with leaving me hanging?

I thought this was the best one of the series that I have read so far. It was funny at times as well as serious. I like the part about her shooting the longbow with the prince and his friends the best for the funny parts. She was good. I recomend anybody to read this book, it is very good.

The main problem I have with Full Cast Audio is that, regrettably, they use Tamora Pierce as a narrator. Having actually met Tamora Pierce, I can say that she doesn't sound nearly so slow/dreary/synthetic in person.
If you just listen to audiobooks without focusing on something else, you probably won't have the patience for FCA, which is a very small production, primarily because of the narrator. I like to do crafts, and I managed to settle into it, but I listen to the words more than the voices. I don't know how it will be for you. On the other hand, if you're listening to this book, you've probably listened to the first two and have decided that you can deal with Tamora Pierce's narrating already.
Also unfortunate is that because FCA is so small, the final book in this quartet is not yet finished, and the release date keeps getting pushed back. I believe it is currently set for June 2010, but it's original release date was in '09, so... cross your fingers or read the physical copy.
Having said that , I found this book to be really quite enjoyable, and if you liked the first two books of the immortal series, then I think you'll quite like this third. The animal characters were ridiculously enjoyable, and you really have to admire the author's sense of humor. She is a fangirl at heart.