Muir is a middle-grade and non- fiction author, a screenwriter. She loves fantasy adventure novels and primarily watches sci-fi and crime drama shows. Born in Scotland and now living in Vancouver, Canada, she often uses the similar landscapes of both countries in her stories.
Roslyn has another life as an award winning screenwriter who writes YA stories, family drama and thrillers. She was a writer on the Global/CBS one hour drama, Ransom, created by Frank Spotnitz. Roslyn has also written several movies that have aired around the world: Washed Away, Stranger in the House, and Reluctant Witness to name a few. Roslyn also wrote and produced the dramatic feature film, The Birdwatcher, directed by Siobhan Devine. She also has several TV series and feature film projects in development, and teaches writing at local film schools and universities.