A Swan-Song Betrayed — Josephine Bell

Anita Armstrong had once been a notable bestseller. But that was before the war, before her marriage, and before her impulse to write died with her husband. Now, as elderly widowed Mrs. Grosshouse, living peacefully and unknown in Devon, Anita begins a new novel, anxiously, hopefully feeling her way and finding it grow. Her literary agent and former publisher are politely cautious, but friends are encouraging and she manages to enlist the services of a girl called Judy to do the typing. Trouble only starts when Judy and her boyfriend Chris appear to be taking much more impatient interest in the progress of Anita's book than its author is even aware of.