From other books I have read, Jeffrey Quill is regarded as perhaps the finest Spitfire aerobatic pilot. This book is certainly an accurate account of the development and success of the aircraft from start to finish and is very informative. Much of the early chapters were taken up with the political wrangling prior to the first production contract and while this is important in the overall Spitfire story, it did seem to go on a bit and didn't have much to do with test flying. I would have liked more detail about the actual flying characteristics with more comparison between the various Marks. I also felt that at the end of the book I didn't know very much about Quill as a person, he didn't give much of himself in regard to his thoughts and feelings about war and the many changes that were happening at the time. Having said all that, I did enjoy the book and would recommend it to anyone interested in the Spitfire story. A similar book that I personally enjoyed more and would highly recommend, is "Portrait of a Legend, Spitfire" by Leo McKinstry.