Margaret Peterson Haddix is an American author known for her work in children's and young adult literature. She was born on April 9, 1964, in Washington Court House, Ohio. Haddix has written over 40 books, with many of them focusing on themes of adventure, mystery, and science fiction. Some of her most popular series include The Missing and The Shadow Children. Her writing often explores complex issues such as identity, family, and the consequences of choices. Haddix's engaging storytelling has earned her numerous awards and a dedicated readership among young audiences.