The City of Ember

I listened to The City of Ember by Jeanne DuPrau, and since I kept listening to it in the same room as my husband, he listened to it too! It's a wonderful tale of adventure, in which Lina and Doon, two twelve year olds who have just left school and been assigned jobs, realize that something is wrong in their City, which is the only point of light in a world of darkness, because the lights keep going out and the generator in the pipeworks is getting old and worn. When Lina finds a message full of holes (her baby sister found it first and chewed on it a bit), she and Doon try to discover what the message says - hoping that these are the instructions that will save their city.
I checked it out. The Listening Library production is AWESOME as it includes great sound effects along with the narration of the story. 6.5 hrs.