Using Geirr Haarr's work with Norwegian-language sources

Geirr Haarr's The Gathering Storm and its companion volumes provide a guide to sources on Norway's fall. Clarke uses them to locate documents and supply context when translating Norwegian material with Google Translate. His Norwegian reading is less fluent than he would like, although his engineering knowledge helps him interpret technical records. Long political reports are harder for him to follow, making the additional historical context particularly useful.