"In this soaring third installment in internationally bestselling author Henry Porter's "timely and terrific" (Mick Herron) Firefly series, former MI6 agent Paul Samson must dodge several attempts on his own life in order to expose a shadowy and dangerous enemy of western democracy. Paul Samson is working for a private security company in London, tailing a mysterious and gifted young employee of a powerful environmental NGO when he is almost killed by a thuggish assassin. Simultaneously, legendary spy Robert Harland is murdered in Estonia and billionaire philanthropist Denis Hisami is poisoned with a neurotoxin while testifying before Congress. A second attempt on Samson's life sends him on the run to Estonia to figure out who is trying to kill him, and why. Soon it becomes clear that Hisami and Harland were running an investigation into a spectral former Stasi agent and her sprawling network of assets across industry and government in the US and the UK when they were attacked. Samson and Hisami's wife Anastasia must tap into their research and expose the spymaster before any more people are killed or agencies compromised. An astonishing and timely thriller examining the penetration of Russian assets into all levels of western life, The Old Enemy is a complex, breathtaking race against time from a master of the genre."--