argaret O'Bannon Womack Vandercook (January 12, 1877 – February 7, 1958) was an American writer of children's literature. Daughter of Joel Mayo Womack and Nannie Gibson (O'Bannon) Womack, she was born in Louisville, Kentucky, where she attended both public and private schools. In 1900 she married John Filkin Vandercook, who later became the first president of the United Press Association. He died in 1908. They had one son, John Womack Vandercook.