The Hunger Games, as experienced by...
...Cleolinda:
I think books about saving a good world are able to be joyous even after moments of great tragedy; books about destroying a bad world always have that awful aftertaste, because they want to include the message that every new world ends up being just like the old, that's how dystopias get started in the first place, war is hell and things happen that people don't ever get over.