After the eruption of the Yellowstone supervolcano destroys his city and its surroundings, fifteen-year-old Alex must journey from Cedar Falls, Iowa, to Illinois to find his parents and sister, trying to survive in a transformed landscape and a new society in which all the old rules of living have vanished. Iowa High School Award 2014 - 15. Interest Level: YA ATOS Book Level: 5 AR Interest Level: UG AR Points: 15 AR Quiz: 146652EN Reading Counts Level: 4.6 Reading Counts Points: 24 Lexile Measure: 730. Teaching Books: https://school.teachingbooks.net/tb.cgi?tid=28362.