This is a brilliant tale of life after a number of serious disasters that destroyed the world as we know it today. Told from the perspective of a female teenage protagonist rather than a 'God's eye view' of the new world, we are introduced to setting, characters, and history fluidly and vividly.
Think of a post apocalyptic world mixed with 'Battle Royale' mixed with Twilight (yes I know, but bear with me here) If you are looking for another sickly sweet love triangle, get on the phone to Stephanie Meyer. This story is more about the will of survival and the confusion that young (first) love offers interspersed with blood, guts, gore and humour.
I read the whole book in one day as juts couldn't let it go, and have followed through with the rest of the trilogy in a similar manner.