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...

When KGB Major Erich Stones defected to the West he should have been handed over to MI5, and the story should have been over for Bernard Samson. But Samson's bosses find an excuse to hold him for questioning, and some of his answers point to the possibility that could tear the department to pieces. Read More...