Loved this book. The "founders" established an underground city with food and supplies to last over 200 years. Next they populated it with adults over 60 paired young children. The adults were sworn to never speak of the outside world...

Now 200 years later, the city is beginning to run out of supplies. They keep waiting for "The Founders" to return again, but must find a way to survive if the lights go out for good. The problem is, they don't know they are "underground" because the city doesn't know the existance of an "above-ground." Will they find a way out into a new world?