the Cold War years 1970-1991 he was Defence Correspondent for
the Dutch national newspaper NRC Handelsblad and contributed
many articles on military, aerospace and intelligence developments.
1965 he also wrote extensively for aviation and defence magazines
in the Netherlands and was co-author of several books. His main
interest has always been focused on aerial reconnaissance, Cold
War incidents and air intelligence.
In 1984 he wrote his first book Spionage vanuit de Lucht,
about secret NATO and Soviet intelligence flights during the Cold
This book was lthe next year published in Great-Britain and the
United States as Aerial Espionage - Secret Reconnaissance
Flights by East and West. Under the same title it was
also translated into Japanese and published in Japan.
In 2009 he wrote MiG's op de vlucht (MiGs on
the run, Pilot Defectors in the Cold War), the first book
about pilot defectors covering the whole spectrum of aerial defections
worldwide since WW2.
October 2016 he published the English language book - The
Secret MiGs of Bornholm - about the Polish pilots who
defected with their MiG-15 fighters to the Danish island of Bornholm
and to Sweden. Many fascinating historical details about the covert
technical intelligence examination of these fighters- not published
before - came from Secret and Top Secret declassified documents.
latest book, De Spionnen van Aeroflot, published
in november 2018, is about spyflights by civil aircraft of the
Soviet airline Aeroflot during the Cold War.