This book was pretty great. 
 Opinions: 
 Antarctica felt too Utopian-ish. Personally, I really don't want my life to be a game. Also, how am I supposed to know if a person is doing something out of the goodness of their hearts or merely doing it just to gain points? Society always has the "good" guys and the "bad" guys, so it's hard for me to believe that everyone in Antarctica agreed to that "game" system. It makes it seem less realistic. 
 And then there were the microphone-communication thingies. I wish there was more detail on that; it felt pretty vague to me. Or maybe it was mentioned in the first two books and maybe it slipped from my mind. Whatever it was, I kept wondering throughout the whole book, 'how in the world do they talk to each other?' I'm guessing there was some earpiece connected to their ears; if it was mentioned in the previous books, I can't remember. If it's constantly attached to them (somehow?) don't they ever get annoyed? And then there's the microphones: where were they? Clipped to their collars? And lastly, how do you "call" someone and disconnect the call? Did they have a device or something? I felt so clueless here. 
 The ending was the happy-sad type. (I feel sorry for you, June) At least it didn't have a happily-ever-after-twilight ending. 
 It's also too bad that Day was sick for most of the time in the book. I loved reading about Day's risky exploits.