He is the author of three espionage thrillers:
- The Watcher: A former government security expert finds himself drawn back into a world he thought he had escaped when a young American diplomat seeks his help with an investigation into the death of her husband.
- The Spy Who Came in from the Cold: A British spy's mission to find a mole within the East German secret service takes a dangerous turn when he falls in love with a beautiful East German woman.
- Tinker Tailor Soldier Spy: A retired British spy is recruited to investigate a mole within the British Secret Service.