This work is the first history of the Norwegian Intelligence Service (NIS) in the Cold War written by independent historians with full access to the archives of the service.

Newsletter of the International Intelligence History Study Group
"This extraordinary book throws light on many intelligence aspects of the Cold War. The author has provided a thorough account of the NIS and struck the right balance between technical detail and readability ... For scholars of modern history it is a "must" read ... Hopefully the publication sets a standard to be quickly followed by other authors and researchers."
Cryptologia, Vol 24, No 3, July 2000
"This book is unique because it is the first time that a Western intelligence service has opened its most secret archives from the Cold War period to an independent historian."
Defense Analysis
"This is a unique study on modern intelligence"
International History Review
"a path-breaking work in the feild of intelligence studies...the book is the outcome of meticulous, scholarly research of the kind so often absent in the field"
Intelligence and National Security
"the first history of a western intelligence service written on the basis of unlimited access to the relevant official archives...despite the technical complexities of the subject, remains full of incident and consistently readable...sets a standard which subsequent intelligence histories will do well to emulate