A. J. Finn, the pen name for Daniel Mallory, is an American author renowned for his work in the crime fiction genre. Born in 1979, he achieved significant acclaim with his 2018 novel, The Woman in the Window, which debuted at number one on the New York Times Best Seller list. This novel was later adapted into a feature film directed by Joe Wright, featuring prominent actors like Amy Adams, Julianne Moore, and Gary Oldman.

In a notable turn of events in 2019, The New Yorker published an article revealing that Mallory had often been deceptive about his personal life and health. In response, Mallory acknowledged his past deceptive actions, attributing them to his struggles with bipolar depressive disorder. This explanation, however, was met with criticism from some in the psychiatric community.

Despite the controversies, Finn's literary prowess continues to shine. His second novel, End of Story, is set to be published in February 2024.

In addition to his novels, A.J. Finn has contributed to numerous publications, including the Los Angeles Times, the Washington Post, and the Times Literary Supplement in the UK. Originally from New York, he spent a decade in England working as a book editor before returning to his native city.