Currently reading and almost finished 'Hunger Games' by Suzanne Collins.

I'm not sure if it is a post apocalyptic world or just in the distant future but the references to our current time are few and far between.
What I do know is the author came up with the idea of the hunger games when watching news stories, she was flicking through and saw people fighting and kids fighting hunger to survive and a spark lit up about a grisly idea about kids fighting in a gladiator like arena controlled by a dictatorship city to make an example of surrounding towns that are forced to supply resources to this said city so they can live a lavish life without having to rely on un-reliable politics.

Any way the story revolves and evolves around Katniss Everdeen a young teenager who has been drawn along with a boy from her district of which there are 12 districts in total to compete in the publicly televised Hunger Games.
Towards the end she realises that in order to save the future generations of district children something needs to be done she can't stand by and watch children slaughtered every year for the entertainment of eccentric population.