The last 5th grade CIA unit is the City of Ember written by Jeanne DuPrau. It is about a futuristic society that was built underground to save the human race from extinction. The people who live in Ember do not know any of this. All they know is that everything in their environment relies on electricity. But, the generator that makes the electricity is starting to break down and there are more and more blackouts. The people are also worried about food, because there seems to be shortages of everything. Students find out that there are two people, Lina and Doon, who want to try to save Ember. How can 12 year olds save a city?