Catching fire by Suzanne Collins
Catching Fire was a sequel to the original Hunger Games, and it continued the series in a very interesting way. In the last book, Katniss and Peeta had just become the first co-winners of the Hunger games. However, Snow and other leaders in the capital saw this as an act of rebellion and needed a way to stop the uprisings caused by the results of the games. So, the Capitol decides the next Hunger Games will be a special one, composed of previous winners. Since the games required male and female winners from each district, Katniss was automatically in the next Hunger Games.