In the second book of Jeanne DuPrau’s Ember series, two communities from very different worlds are forced to depend on each other just as supplies, tempers, and fears begin to run low. As hope for a safer future meets suspicion and conflict, a small group of young people must navigate a tense and uncertain path toward cooperation. Atmospheric and suspenseful, this post-apocalyptic adventure explores survival, trust, and what it takes to build something better after collapse.