Before Suzanne Collins gave Hunger Games fans the story of Haymitch Abernathy’s games in Sunrise on the Reaping, she had already begun expanding the universe with the prequel novel The Ballad of Songbirds and Snakes, which features new characters like Lucy Gray Baird and Sejanus Plinth. These new characters are not referenced in the original trilogy, but they are important to understanding the wider scope of Katniss’ story and the revolution in Panem as a whole.