Sarah took part in the television series Who Do You Think You Are? to find out about her ancestors and learned quite a bit about her ancestor Lady Margaret Montagu Douglas Scott. She then decided to write a novel about Lady Margaret and learned, "In researching her, I found out more about my own DNA, and I found that resilience and courage and sense of hope and optimism. I am a full-blown Celtic redhead, and that comes with a great enthusiasm for life, great spontaneity, and also - you just fight on."
It is this intense persona that she feels inside her that clashes with her desire for calmness. "I think Her Heart for a Compasswas an extraordinarily challenging time for me because each line and each chapter, and each just well each line each Sentance each paragraph each chapter was in search of my own heart."