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 considers how she will kill her fellow competitors during the first Games, at one point rationalizing that she is already a killer due to her hunting experience, though she is briefly disturbed after her first direct kill, Marvel. By the end of the first Games, she is prepared to shoot Cato, and attempts to do so only to be interrupted by Peeta being attacked by the muttations. Despite her cold-bloodedness, she is nonetheless extremely relieved at not having to kill her allies Rue and Peeta. As the series progresses, however, she becomes increasingly cold-blooded, to the point where she objectively