Sadie by Courtney Summers is a gripping and emotionally intense novel that follows a nineteen-year-old girl, Sadie Hunter, who disappears after the brutal murder of her younger sister, Mattie. Determined to seek justice, Sadie sets off on a personal quest to find—and kill—the man she believes is responsible. Told in dual narratives, the story alternates between Sadie’s harrowing journey and a true-crime podcast called The Girls, where radio host West McCray investigates her disappearance. As the podcast unfolds, chilling truths emerge, exposing cycles of abuse, trauma, and the way society consumes tragedy. Through its raw voice and powerful structure, Sadie delivers a haunting portrayal of loss, vengeance, and the fierce bond between sisters.