Ember

Yes, its true as my mom says "I've come to the dark side" apparently, but The City of Ember probably is the first book I've ever read where i actually didn't want to put it down! i'm done reading it now but I'm on the 2nd book after Ember and its called The People of Sparks. The 2nd one isn't as good as the first so far but i still wanna read all 4 books i the series because i think its pretty interesting! The 3rd book is actually a Prequel (which means that its about what happened before the 1st book and then the 4th is what happens after the 2nd I believe anyways) and i want to read the 3rd the the 4th. Those two are called The Prophet of Yonwood and The Diamond of Darkhold.