Catching Fire was later released in ebook and audiobook format. "Catching Fire" received mostly positive reviews, with reviewers praising Collins' prose, the book's ending, and the development of Katniss's character. According to critics, major themes of the novel include survival, authoritarianism, rebellion and interdependence versus independence. The book has sold more than 19 million copies in the U.S. alone. A film adaptation, "", was released on November 22, 2013. After winning the 74th Hunger Games in the previous novel, Katniss Everdeen and Peeta Mellark return home to District 12, the poorest sector in the country of Panem. On the day that Katniss
Katniss Everdeen compete for the hearts of sponsors who donate money that can be used to buy vital supplies for them when they are in the arena. The concept of how the audiences carry nearly as much force as actual characters is based on how, in reality television and in the Roman games, the audience can both "respond with great enthusiasm or play a role in your elimination," as Collins said. Katniss's first name comes from a plant called "Sagittaria" or arrowhead, which is a tuber plant, usually found in water; another name for this plant is katniss. The root of this