Throughout the first half of this book, I was telling myself I'd give it a 3 starts maximum to be kind because I love the universe so much. But I finished the book wanting to give it 4 minimum. The only reason it doesn't get a full 5 stars is that the chapters in the first half were hit and miss for me.

Otherwise, this book was phenomenal. The action was riveting and well-written, along with the characters of whom I am in awe. I did find it difficult sometimes to believe these charters are 16-17, but it's a YA novel so I can't really quarrel with that. The relationships between the characters were really gripping and I found myself laughing, smiling, and crying both with and in response to them.