"Insurgent" is the second book in the Divergent series by Veronica Roth. Set in a dystopian future, it follows the story of Tris Prior as she navigates a society divided into factions based on human virtues. The narrative explores themes of identity, loyalty, and the consequences of choices in a world filled with conflict. In "Insurgent," Tris and her allies face the oppressive regime of Jeanine Matthews, who seeks to control the factions through fear and manipulation. As they fight for freedom, Tris grapples with her own identity and the impact of her past decisions, leading to intense action and emotional struggles throughout the story.