Colonel Butler is sent on a walking tour of Hadrian's Wall as a stalking horse by David Audley. They are trying to flush out foreign agents who are systematically ruining the careers of Britain's most promising students and young academics. Read More...

The excavation of Philip Masson's body near Mrs Griffin's cottage resurrected several old ghosts. Rumours abounded, and young Jenny Fielding, asked to investigate, had heard one that David Audley was involved. A labyrinthine trail leads Jenny to a Spanish battlefield and the knowledge why Philip Masson had to die. Read More...