Career
He lives in Bærum. Since 1980 he has worked as a journalist in Aftenposten. His first book was Sagaen om de norske Northrop-flyene på Island, published in 1981, about the Number. 330 Squadron RNoAF while it was stationed in Iceland during the Second World War.
He followed up with Fornebu 9. april in 1990, about the German invasion of Oslo Airport, Fornebu on 9 April 1940.
Foreign this and later books he established his own publishing company, Wings Forlag. Guhnfeldt"s third book was Bomb Gestapo-hovedkvarteret! about the Oslo Mosquito raid on 25 September 1942.
Later books include a biography of Marius Eriksen (2002), Tarald Weisteen (2004) and Gerd Vold Hurum (2006). He then wrote a series about the Supermarine Spitfire, Spittfire Saga.
