According to Wikipedia: "Louise Fitzhugh was an American writer and illustrator of children's books, known best for the novel Harriet the Spy. Her other novels were two Harriet sequels, The Long Secret and Sport, and Nobody's Family is Going to Change.
Fitzhugh was born in Memphis, Tennessee, to wealthy parents in 1928. Her parents divorced when she was an infant and her father, Millsaps Fitzhugh, gained custody; she lived with him in the South. She attended Miss Hutchison's School and three different universities. She lived in Washington, D.C., France, and Italy.
She attended Bard College where she became involved in politics and anti-racism. She studied art in Italy and France, and continued her studies at the Art Students League and the Cooper Union. She lived most of her adult life in New York City and had houses in both Long Island and Bridgewater, Connecticut."