Kari Stenman is undoubtedly the most knowledgeable authority on the Finnish Air Force in World War 2, having written over a dozen books on the subject since the late 1960s. The co-author of the successful Aircraft of the Aces volume on Finnish fighter pilots, he runs his own publishing company in Finland. Kalevi Keskinnen is an expert on Finnish aviation of World War 2. He works full time as an aviation author and lives in Finland. Arguably the finest profile artist in the business, John Weal's love of German aircraft in particular makes his work a treat for students of the subject. He illustrated the Finnish aces volume in the Aircraft of the Aces series.