The Marching Season - Daniel Silva (Michael Osbourne Series, Book 2)

The hero of "The Mark of the Assassin" returns to the CIA to battle his deadly nemesis. When officer Michael Osbourne uncovers a dark plan targeting his father-in-law, the American ambassador to London, for execution, a deadly chain of events thrusts him back into the sights of the most merciless assassin the world has ever known.