The City of Ember, written by Jeanne DuPrau, is a captivating space novel for kids set in an underground city. The story follows Lina and Doon, two young friends who discover clues that could lead to the long-lost exit from their decaying city. As they embark on a dangerous journey to save their people, Lina and Doon uncover shocking truths about the city's history and the fate of its inhabitants. This thrilling adventure will keep young readers hooked from beginning to end.