Gone Girl is a gripping crime mystery novel written by Gillian Flynn. The story follows the disappearance of Amy Dunne on her fifth wedding anniversary, and the subsequent investigation that unfolds. With its unpredictable twists and turns, the book keeps readers on the edge of their seats, questioning the motives and actions of each character. Flynn's writing style is dark and atmospheric, creating a sense of unease throughout the narrative. Gone Girl has become a popular choice among crime mystery enthusiasts, thanks to its complex characters and intricate plot.