Granger Bill. The Man Who Heard Too Much

It begins in Sweden. A low-level defection by a Russian sailor in Stockholm coincides with the theft of critical tapes at a high-level Soviet-American conference in Malmö. At stake is a sophisticated computer virus potentially more lethal that any biological plague in history.
From Paris to Copenhagen to Washington to the Vatican, two adversaries once more find themselves on opposite sides: Henry McGee, the traitorous, seemingly indestructible double agent, and Devereaux, code name November, waging his personal, deadly war for — and against — both the CIA and the KGB.