Sight For Sore Eyes, Paperback/Ruth Rendell

Teddy Brex emerges from a loveless, isolated childhood as a handsome but autistic young man. Francine Hill, traumatised by the murder of her mother, grows into a beautiful young woman, who must endure the protectiveness of an obsessive stepmother. Teddy Brex does ride to her rescue, but he is a man who has already committed two murder... twice.