The detailed information about individuals caused embarrassment to the German embassy in Ireland, some of whose staff were in post during the war and suspected of spying, while Helmut Clissman, one of the sources for the book and by the 1960s an Irish citizen and established businessman in the country, was revealed to have been an "Abwehr" officer during the war whom the Nazis twice tried to smuggle into Ireland to work with the Irish Republican Army against the British.