The British intelligence historian Christopher Andrew wrote two books, Sword and the Shield (1992) and The KGB and the Battle for the Third World (2005), based on material in the Archives. They give details about much of the Soviet Union’s clandestine intelligence operations around the world.
Books in order of publication:
Sword and the Shield (1992)
The KGB and the Battle for the Third World (2005)
The Secret World: A History of Intelligence – (2018)