Madeleine L'Engle (1918 – 2007) (née Camp) was an American writer best known for young adult fiction, particularly the Newbery Medal-winning A Wrinkle in Time and its sequels: A Wind in the Door, National Book Award-winning A Swiftly Tilting Planet, Many Waters, and An Acceptable Time. Her works reflect both her Christian faith and her strong interest in modern science.