When former CIA deep cover operative Nathan Monsarrat opens the letter from an old friend assigned to the White House - the security of our government has been compromised, the danger is existential, and you are responsible for saving us - he plunges into an extraordinary Oval Office scandal. Monsarrat soon discovers the difficulty of remaining alive when the most powerful men and women in the government want him dead. Racing to collect evidence to prove his innocence, pursued by enemies sworn to kill him - a vengeful ex-lover, a treacherous mercenary, a Moscow Centre assassin - Monsarrat hurtles from the beaches of Cape Cod to the sands of the Sinai Desert, and from the glamour of Lincoln Center to the purlieus of South London, en route to a fateful dénouement with the President of the United States. With nonstop action, exotic locales, and twisting plots, A CERTAIN ENEMY takes readers on the thrill ride of their lives.