I listened to the core set of books before this side story. Unlike other reviews, I did not find this duplicative to the core books. I really enjoyed following Finn’s story from entering AO to the conclusion of this book. Pros: lots of great action. The fight sequences are well described and exciting. Cons: I find the narration annoying at times. The accents are mediocre, and worse is in many segments the sound of him taking breaths after each sentence are clearly heard and distracting. Overall if you liked the original series you will like this.