Comparative Study of Murder Mysteries; Agatha Christie and Sheila Radley The novels Death of a Maiden and Appointment with Death, written by Sheila Radley and Agatha Christie, are murder mysteries describing a betrayal of trust. While both are similar in this way, it is the differences between the two novels that make the similarities remarkable. By comparing the victims, the killers, and the investigators, the differences in the novels are revealed. The victims in the novels, Mary Gadge and Mrs. Boynton, were murdered in very different ways. Mary Gedge was drowned in Ashthorpe river in her home town of Godbold; The girl lay face-down, arms out