"The City of Ember"

Reading Jeanne DuPrau's "The City of Ember."  I'm a little less than half way through.  I wonder if we ever find out why Ember was built to begin with, and where it is.
I wonder if Doon is going to get upset that he can't solve his problem alone, hope I haven't said too much!
Check out my reader's notes!

"Heaven"

I just finished "Heaven" by Angela Johnson.  It was pretty good, but I wish it had more of a back story on Jack.  I wonder if Marley moves in with Jack, I hope not.  I hope she stays with her family and sees him often.
If you moved anywhere based on its name what city would you choose?
What kind of person does Jack seem like?