I strongly recommand a book I bought in the US and that I have read during my holidays :

ANDREW Christopher & MITROKHIN Vasili,
The Mitrokhin Archive vol. II : The World Was Going Our Way: The KGB and the Battle for the Third World, Basic Books, New York 2005.
It was released in 2005 but not much publicized in France, hence this note that I hope will draw attention. Volume I (*) was also worth reading but we learn more in Volume II's foreword by Christopher Andrew about the story of Vasili Mithokhin, a KGB defector that fled to Great-Britain in 1992. He died in 2004 and most of his biography can now be narrated (he was a KGB archivist during the Cold War and became a silent dissident to the communist regime).

However, his life is not the subject of the book. These 2 masterpieces are as objective and accurate as possible. Contrary to James-Bond style espionage pseudo-historical stories based on rumours and disinformation, these 2 are of academic quality thanks to the KGB archives brought to the West by Vasili Mitrokhin. But I won't tell more. You will only know who was a KGB agent and which movement or government was financed by the USSR if you read them.
(*) The Mitrokhin Archive vol. I : The KGB in Europe and the West, London, Penguin, 2000 (first published 1999).