Gone Girl, written by Gillian Flynn, is a captivating urban mystery fiction book that keeps readers on the edge of their seats. The story revolves around Nick Dunne, whose wife Amy goes missing on their fifth wedding anniversary. As the investigation unfolds, secrets and lies are revealed, leaving readers questioning the truth and the characters' motives. Flynn's masterful storytelling and unpredictable twists make this book a must-read for fans of the genre.