Lois Duncan, who lives, works and sets her novels in Albuquerque, New Mexico, is a recent but immediately successful arrival on the British scene. Popular as she is, not only with the soft underbelly of the literary world, the children's book reviewers, but with its most hardened carapace, the teenage library book borrower, her novel of 1973, I Know What You Did Last Summer has now been published in England….

The story takes place on several levels. As a simple thriller, the mystery of who is responsible for the letters, the threats and the violence, is handled with skill and panache, and, as we have come to expect from Miss Duncan, with a rare gift for suspense. She makes illuminating use of the contrasts between the relationships of Julie and Ray on the one hand and Helen and Barry on the other. Miss Duncan also airs the moral conflict...