Henriette Roosenburg (1916-1972) was born into a wealthy family of doctors in The Hague. During the Second World War, she worked for an influential illegal Dutch newspaper, Het Parool, until a secret agent recruited her to a clandestine route for smuggling people and intelligence over the border into Spain. In 1994 she established a military espionage route to Switzerland for the Dutch government. After the War, Roosenburg worked in New York as a reporter for Time, LIFE and Fortune. The Walls Came Tumbling Down (1957) made her instantly famous and was a bestseller in both the US and the Netherlands.