I would give this book a 4.5. I listened to the audio book of this with my husband as I did the other 2 books in this trilogy. We both loved the entire trilogy. My husband did have 1 complaint about this last book though, and I kind of agree with him. He felt that the ending was a bit too rushed and that this really could have been a 4 book series. When we only had 45 minutes left of the book I was like how are they going to get to the end of everything with so little time remaining, but it did. We both agree that Mackenzie's character could have gained more skills and other characters could have been developed a bit more. It almost felt like if you were only allowed to make it a certain number of pages and just realized that you were running out of pages but still had to wrap up the story so the ending gets super condensed. Again, we both seriously enjoyed listening to the audio book and I have already purchased a physical copy of the first book and plan on buying the other 2 books soon. Also on a little side note, there were some eerie similarities between the what the character that wants to run for President says and things that Donald Trump has said, though this book came out before Trump even started his campaign. ( )