The book series that features a character named Katniss Everdeen is "The Hunger Games," written by Suzanne Collins. This dystopian trilogy follows the story of Katniss, a resilient and resourceful young woman living in a post-apocalyptic society. The series explores themes of survival, rebellion, and the consequences of totalitarianism. It begins with Katniss volunteering to take her sister's place in the brutal Hunger Games, a televised fight to the death. The story continues through her struggles against the oppressive Capitol and her personal growth into a leader and symbol of hope.