The Red Door (Inspector Ian Rutledge Series #12)

Lancashire, England: June, 1920. Who was the woman who lived and died behind the red door? What did she see before she died? And who was the man who never came home from the Great War, for the simple reason that he had never really gone? How is the woman's death linked to his disappearance? And why is Scotland Yard blind to the connection, even when Inspector Ian Rutledge points it out?