The book City of Ember by Jeanne DuPrau , is a great book . I  think everyone should read it. The main problem is Ember is running out of supplies  and somebody needs to save them. The main characters are two kids named Lina and Doon.  Lina  likes adventure . She is always getting into trouble.  Doon's dad owns the tiny things store . Doon tries hard at whatever he's doing. He tries never to give up. They think Lina's grandma has gone mad because she is looking  frantically for something that they think does not exist:  the secret to save Ember. Poppy, Lina's baby sister finds it and chews it up. Lina and Doon have to decipher it and figure out what to do.

    There are many mysteries in this book so be ready  like : where is this city? why was it made? is there a way out? will anyone survive? You will have to read to find out!!!!