The Hunger Games (Hunger Games Trilogy, Book 1)

In the ruins of a place once known as North America lies the nation of Panem, a shining Capitol surrounded by twelve outlying districts. The Capitol keeps the districts in line by forcing them all to send one boy and one girl between the ages of twelve and eighteen to participate in the annual Hunger Games, a fight to the death on live TV.
Sixteen-year-old Katniss Everdeen regards it as a death sentence when she steps forward to take her sister's place in the Games. But Katniss has been close to death before-and survival, for her, is second nature. Still, if she is to win, she will have to start making choices that weigh survival against humanity and life against love.