Famous for her bestselling Kevin and Sadie young adult series, Lingard is also notable for her Buxtehuder Bulle prize-winning work Across the Barricades and for her Carnegie Medal-shortlisted book Tug of War.
She published her debut novel, Liam's Daughter, in 1963, and her first work of children's fiction, The Twelfth Day of July, in 1970.
Her work Tom and the Tree House received the Scottish Arts Council's 1998 Children's Book Award.
A native of Edinburgh, Scotland, she married a Canadian citizen and raised three daughters.
She and Catherine MacPhail are both popular Scottish writers of children's literature.