On THE DECSIVE DUEL: SPITFIRE VS 109 The epic struggle between the Spitfire and the Messerschmitt 109 upon which so much of western civilization depended in the summer of 1940 has found the ideal biographer in David Isby. I write "biographer" because, like the men who flew these remarkable fighter planes, Isby sees them in almost human terms, transcending the mere mechanical. (Andrew Roberts, Author Of The Storm Of War )