-"Sword and the Shield" which is based on the Mitrokhin Archive. It documents a fair amount of the KGB's activities during the cold war. It names names of KGB spies and collaborators in the west, plans for sabotage in case of war, etc etc.
-"The Bridge at Andau" by James Michener. About the Hungarian revolution of 1956.
-"The Great Terror: Stalin's Purge of the Thirties" self explanatory.
-"The Gulag Archipelago" by Alexander Solzhenitsyn
-And to give a view from the other side "Che Guevara A Revolutionary Life" by Jon Lee Anderson. Basically a hagiography about the patron saint of the left. As might be expected, full of sheet in many places, yet it does give some insight into the Cuban revolution.