Gone Girl by Gillian Flynn

"Gone Girl" is a psychological thriller novel written by Gillian Flynn, first published in 2012. The novel tells the story of Nick Dunne, who becomes the prime suspect in the disappearance of his wife, Amy. The plot alternates between Nick's present-day experiences and Amy's diary entries from before and during their marriage, revealing the disintegration of their relationship and secrets they kept from each other. The novel was a commercial and critical success, and sold millions of copies worldwide. It spent over two years on The New York Times bestseller list. It was later adapted into a highly successful film of the same name directed by David Fincher and released in 2014, which was also a critical and commercial success. The novel and its adaptations have been praised for its plot twists, unreliable narrators, and its exploration of themes such as marriage, gender roles, and the darker side of human nature.