‘You need to realise that we are operating as if it were war.’

During the Cold War, six Dutch submarines secretly gathered intelligence about the Soviet Navy. Only a handful of people outside the Royal Netherlands Navy were aware of these operations, as they were not NATO operations.

For the first time, In Deepest Secrecy describes these top-secret deployments in detail. On the basis of interviews and archival research, Jaime Karremann reveals how the Dutch submarines followed, photograp...