Gone Girl is a gripping psychological thriller written by Gillian Flynn. The story follows the disappearance of Amy Dunne on her fifth wedding anniversary, and her husband Nick becomes the prime suspect. As the investigation unfolds, the narrative alternates between Nick's perspective and Amy's diary entries, revealing a complex and twisted relationship. With its unpredictable twists and turns, Gone Girl keeps readers guessing until the shocking truth is finally revealed. This critically acclaimed novel explores themes of marriage, identity, and the dark side of human nature, making it a compelling and thought-provoking read.