Legend by Marie Lu
Set in a dystopian future where the United States has fractured into warring nations, the story follows two teenagers from radically different backgrounds. One is a notorious criminal, known for his intelligence and ability to elude capture, while the other is a prodigious student and soldier, working for the government in hopes of avenging her brother's death. Their paths cross when the soldier is tasked with hunting down the criminal, leading to a cat-and-mouse game that unveils a web of lies and corruption. As they learn more about each other and the dark secrets of their society, they must decide where their loyalties lie and what they're willing to fight for.