I could see this book being made into a movie, and the entire journey of the narrative was described so vividly, you could see Zoey's world as you read. I really identified with Zoey as a character and was rooting for her. There was great character development and just the right amount of explanation that you were neither frustrated at not understanding, nor were you bored with the tedium of the world-building. 
 The book could have ended here and been a satisfying read. However, I am looking forward to the subsequent novels. It could go in any direction and I'd like to be there for the next part of Zoey's journey.