The Witness, what the novel is about.

The Witness – Josie MacDonald, a landscape artist is visiting her aunt Molly who lives in the peaceful village of Garmouth near Spey Bay in Morayshire. On a painting trip early one morning Josie was witness to an horrific murder. Mr. Mac, the deranged killer is aware that Josie has seen him at work but after a terrifying chase Josie manages to escape. Mr Mac tracks her down to her home in London where his plan takes an unexpected turn. Josie is forced to bear the brunt of psychological torture and anguish as one by one her friends are drawn into the nightmare. Josie has to return to the scene of crime in order to discover the truth. The story reaches its climax when she unearths a serial killer who has been working in the highlands for nearly thirty years. With time running out and a killer on the lose, Josie has to prevent her abducted friends from becoming victims whilst surviving long enough to bring their terrible ordeal to an end.