Originally Posted by
Martin the Martian
Currently reading Looking Down the Corridors: Allied Aerial Espionage over East Germany and Berlin, 1945-1990 by Kevin Wright and Peter Jefferies. I am sure some regulars here are far more familiar with the subject than I am, but I am finding it fascinating.
Either books on Brixmis by Tony Geraghty and Steve Gibson are well worth a read, fascinating things that were got up to in East Germany during the Cold War.