Recount the life of Canadian pilot William Henry Nelson, his heroic WWII exploits, and the enduring impact on his wife and son.

Battle of Britain Spitfire Ace is the story of a young Canadian who in a short time, and for a brief time, mastered Britain's most legendary war machine, the Spitfire. It is also the story of a young English woman who was for a short time his wife, and for a long time his widow, and of their son who for much of his life knew little about his father and is still learning about him. Their stories, based on their letters, diaries, and photos, unfold in richly detailed context as the setting moves from Montreal in Nelson's youth, England in the last years of peace, the first (and largely forgotten) months of the air war against Nazi Germany, Canada during the war, and finally to post-war England.

William Henry Nelson was a first-generation Canadian Jew whose family name was originally Katznelson. Like many young Canadians in the 1930s, he wanted to fly. Nelson began work in Montreal's aircraft industry, but in 1936, at the age of nineteen, he left a humdrum life on the ground to go to England, intent on becoming a pilot in the Royal Air Force. A year later he was posted to a bomber squadron. Willie (as his family and friends called him) was also a fine athlete. He was captain of his squadron's team in Britain's Modern Pentathlon competitions in 1938 and 1939. While stationed in Yorkshire, he met Marjorie McIntyre. Instantly smitten, they married days before the war began.

Nelson was one of the first Canadians to fly in combat over Germany, only days after the war began. The award of a Distinguished Flying Cross a few months later made him an instant hero to the Jewish community across Canada. In Britain's desperate situation in June 1940 Nelson volunteered to retrain as a fighter pilot. Within weeks he destroyed five enemy aircraft, so becoming the only Canadian Spitfire ace in the Battle of Britain. Few fought as both bomber and fighter pilot during the Second World War, even fewer managed to excel at both. Willie Nelson was shot down on the first day of November, 1940, near the English Channel. He never saw his adversary, who may have been one of Nazi Germany's most decorated fighter pilots. Nelson was 23 years old, and by then the father of a two-month old boy, William Harle Nelson.

Marjorie took her infant son to Canada in 1941, seeking to meet her late husband's family and provide little Bill the oppor