Mary, Lady Stewart was a British novelist who developed the romantic mystery genre, featuring smart, adventurous heroines who could hold their own in dangerous situations. She also wrote children's books and poetry, but may be best known for her Merlin series, which straddles the boundary between the historical novel and fantasy.

The Moon-Spinners is a 1964 American mystery film starring Hayley Mills, Eli Wallach and Peter McEnery in a story about a jewel thief hiding on the island of Crete. Produced by Walt Disney Productions, the film was loosely based upon a 1962 suspense novel by Mary Stewart and was directed by James Neilson. It featured the legendary silent film actress Pola Negri in her final screen performance.