At the end of the Second World War, the city of Berlin was located 100 miles (160 km) inside the Soviet Occupation Zone of Germany. The Western Allies insisted on keeping part of the city for themselves, and so it was divided into four sectors, mimicking the rest of Germany.

Andrew Long, from Great Britain, is a military history researcher and author. His fascination with the Cold War began with a trip to West Berlin in 1986, travelling through Checkpoint Charlie to visit the East. Andrew's writing comes from a desire to make sense of an extremely complex period in modern history, weaving together inter-relating stories involving politics, ideologies, personalities, technological advances, and geography. There is still much to be told on this fascinating subject. After a successful career in marketing, Andrew relocated to Cornwall and took up writing full time.