Collins Suzanne. The Hunger Games. Catching Fire. Mockingjay

This boy and girl have known each other since childhood and may even fall in love, but they are forced to become enemies. By lottery, they must take part in the terrifying Hunger Games, where only one person can win — a law that has never been broken…
Katniss and Peeta survived — they forced the Capitol to recognize both of them as victors.
But many of those who dislike this outcome consider the boy and girl dangerous. These people have enough power and influence to easily kill both Peeta and Katniss.
Yet no one is strong enough to separate them…