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Riveting, and kept me wanting to read more. That's Shusterman! I loved how varied the main characters were (Alyssa, her 10-year old brother Garrett, the survivalist across the street Kelton, the independent Jacqui, and the observant/conniving Henry), and how what the other characters observed about each other helped me understand the motives of each. A couple of spots actually made me gasp aloud, and I was pouting when I'd accidentally left the book at school. What I didn't really appreciate was that everything was wrapped up nicely at the end...