Books on the history of fortifications are plentiful. Medieval castles, the defensive systems of the seventeenth, eighteenth and nineteenth centuries, the trenches and bunkers of the First World War, the great citadels of the Second World War – all these have been described in depth. But the fortifications of the Cold War – the hidden forts of the nuclear age – have not been catalogued and studied in the same way. Paul Ozorak’s Underground Structures of the Cold War: The World Below fills the gap.
