The City of Ember, Jeanne DuPrau, Random House c2003, 270 pages.

First in the books of Ember series The City of Ember is fast paced mystery and science fiction.The main characters, Lina and Doon have been living in Ember all their lives and attending school. Then at age 12 they are assigned their life's work and the story of their search for a way to save Ember begins.