Había una vez . . .There lived a girl named Petra Peña, who wanted nothing more than to be a storyteller, like her abuelita.But Petra's world is ending. Earth has been destroyed by a comet, and only a few hundred scientists and their children – among them Petra and her family – have been chosen to journey to a new planet. They are the ones who must carry on the human race.Hundreds of years later, Petra wakes to this new planet – and the discovery that she is the only person w