In Christmas-Tree Land, brother and sister Rollo and Maia go to stay with their cousin in an enchanted country of fir trees — a land of Christmas trees — and a fairy-tale castle. There they discover a cottage in the wood inhabited by a mysterious godmother who tells the children the story of Aureole, the King's daughter.

Mary Louisa Molesworth, née Stewart (29 May 1839 – 20 January 1921) was an English writer of children's stories who wrote under the name of Mrs Molesworth. Her first novels, for adult readers, Lover and Husband (1869) to Cicely (1874), appeared under the pseudonym of Ennis Graham. Her name occasionally appears in print as M. L. S. Molesworth.