Margaret Colleen Hoover is an American author who writes primarily novels in the romance and young adult fiction genres. She is best known for her 2016 romance novel, It Ends with Us. Many of her works were self-published, before they were picked up by a publishing house. As of October 2022, Hoover has sold approximately 20 million books. She was named one of the 100 most influential people in the world by Time magazine in 2023.