While the film blends reality with imagination - the 2011 book "Anne Perry and the Murder of the Century" is an extremely detailed and thorough telling of the story and an invaluable source for more specific details as to the events depicted in this film. The film is lovely and full of imagination, but the book's straight-forward details, and the less-fantastical and astonishingly true-life events as they occurred, is required reading for any fans of this film or of the writer Anne Perry.