The secret families - John Gardner (Secret Families Trilogy #3)

It is December 1964, fourteen years since the close of The Secret Houses, and Caspar Railton, the ‘wounded lion’ of the Railton clan, is dead. But after a lifetime of distinguished work in the British Secret Intelligence Service, it now appears that Caspar Railton was a traitor. Since his death, witnesses and documents have surfaced attesting to his treacherous past, and both the Railton clan and the Farthings — the American family joined to the Railtons through marriage and a shared commitment to espionage — become suspect as well.

Refusing to believe his uncle could be a traitor, Donald Railton, called Naldo by his family and friends, enlists the help of his cousin and close friend Arnold Farthing to clear both families’ names. Naldo’s and Arnie’s quest to uncover the truth about Caspar’s past takes them on a spinning ride through the most dangerous of territories under-cover operatives can enter. Shifting between post-Second World War Germany and England, Cold War Russia and Vietnam-era America, The Secret Families is a powerful blend of intrigue and drama by a master of the game.