The Diamond of Darkhold

I know I said that Science Fiction books were read by Tony...but this is one series that I read and enjoyed! The series, written by Jeanne DuPrau, begins with the City of Ember. Three books follow that one: The People of Sparks, The Prophet of Yonwood and then the Diamond of Darkhold. The series follows the citizens of Ember who live underground because the Disaster forced them to find a new home to ensure their survival. The most recent book finds these people living in Sparks where life is extremely hard. Two young people set out to their old city of Ember to discover the secret of a book they found. They hope to find something that will make life in Sparks easier...read it to find out what they discover and if they help the people of Sparks!