1939-1945 biplanes brothers denmark england englishliterature espionage fiction general historicalfiction intelligenceservice largetypebooks marineradiostations military militaryapplications nationalsozialismus openlibrarystaffpicks radar spionin teenageboys teenagers thrillers undergroundmovements war warstories warundergroundmovements widerstand womenintelligenceofficers womenspies worldwar worldwar(1939-1945)fast(ocolc)fst01180924