Katniss wanted to win the Quarter Quell (the 75th Hunger Games). But, in order to win she had to face a bunch of different challenging obstacles. So, she and her allies figured out a plan to kill the other tributes. Then, Katniss and Peeta realized that the 75th Hunger Games was just a trick on them.
I loved Catching Fire because it has a bunch of exciting twists and I love books like that. It also kept me interested and I never wanted to stop reading it.