The City of Ember by Jeanne DuPrau
Another one I listened to on CD, I like having the noise while I do housework! It was very intriguing a good read for a 10-15 year old boy or girl. It's about a city underground that's loosing power. They don't know they're underground though...it's sort of a mystery. I really really liked it and am listening to the second book, The People of Sparks, right now. I enjoy the way the writer expresses herself.