I really enjoyed this book. There was a lot of action and plot advancement and some resolution, especially to the journey of Paul, Olivia and Joyce. Honestly, the writing is really only a 4-4.5. There were editing issues with some awkward sentences and punctuation and the less forgivable error of a character name mix-up. Katherine becomes Rachel and then Katherine twice and there is no other mention of a Rachel. My enjoyment of the story and my affinity for a lot of the characters caused me to bump it up. I like that the US government is working hard and not evil and not incompetent. I also like that the soldiers, especially in Minneapolis, are good guys, trying to do their best; they are often portrayed badly in books of the genre. This ends on a huge cliffhanger and now I have to worry about Paul, Commander Watts and Claire, in particular. I really want to see what George obtained in Wakefield and to see every person that was part of Chaos Dawn get what they deserve.