Theme - Elsewhere

I think the theme in the book Elsewhere is that there is life after death.  I think this because of the books plot.  A girl dies at fifteen and is angry that she didn't get a chance to fall in love or have kids or do her dream  job or do anything that she wanted to do.  Her life was cut short and she was denied the privilege to do everything that most people get to do.  In Elsewhere, Liz got to do the thing that so wanted to do most, and that was fall in love.  The whole book is set in a place that you live after death, so one theme is that there is life after death.
Another possible theme is that you have to let go of the past to live in the present.  I think this because Liz was obsessed with the Observation Decks and she wouldn't let go of her life on Earth.  When she finally let go, she started to enjoy her time on Elsewhere and see that the two weren't so different at all.  Once she opened her horizons she started to like Elsewhere more and more.