I read and I don't think it's the best, I actually think this kind of degrading on Brandon Mull's talent. I thought it was lacking in description and character; this was centered around a game wasn't it? If it was, what did the company pay people to write the book in order to get attention? That's low (plus the fact that not many people read). I felt this was a little too simple, which is perfect for kids, and maybe a little rip off of Deltora Quest. I mean reoccurring evil and traveling around the world to find mystic items; at least in Deltora Quest, the villain is nonhuman. They could've put a little mystery in this book, just for old readers to stop and think what's to happen. That's what I look for in a book: something to think about.
But I will admit some good points, there is some creativity in here and the spirit animals is maybe an original idea (or another rip off of the Golden Compass). However to be able to use that animal's special abilities is a new concept that can be explored further. Which make me think: what if those that don't have spirit animals can actually force a creature to be theirs? That would be an interesting development. But you won't hear me making another review for this series.