Venona: spåren från ett underrättelsekrig by Wilhelm Agrell.
A history of the Venona telegrams intercepted in Sweden during the Second World War, and the implications of their decoding on the revelations of Soviet espionage in Sweden during the period.
Man, that was a long sentence.
Agrell describes the Venona decrypts as the “Dead Sea Rolls of the Cold War”. The limited decryption of the traffic meant that the recovered plaintext nearly raised more questions than it answered.