The Dobie Paradox — Desmond Cory

Eccentric mathematics professor John Dobie and his rather more practical girlfriend, Dr. Kate Coyle, are braving an Atlantic gale to visit a patient in a local clinic when they find a comatose young girl lying by the roadside. Despite their best efforts, seventeen-year-old Beverly Sutro dies that evening.
Was she the victim of a random hit-and-run on the lonely windswept hillside or did someone have altogether more deliberate plans for her death? To the irritation of the Cardiff police, Dobie - in his own inimitable way - begins to investigate. With Professor Dobie assisting the police with their inquiries, anything can happen - and generally does.
Initially, Dobie's wayward attentions are focused on the local clinic, where brilliant young author Adrian Seymour is undergoing treatment for drug addiction. But the trail leads ever outward until it points, alarmingly, to the chief of a powerful crime syndicate currently behind bars. Luckily Kate is on hand to help with matters forensic, for Dobie has stumbled on a vital clue....