I am lucky enough to have read this in the first edition of 1941, which belonged to my grandfather. The book was originally published anonymously and the dust jacket still bears the price of 6s. This original edition added even more to the authenticity of "Fighter Pilot's" experiences.
Even if you do not have a first edition, this is a terrific book. The tension of seemingly endless waiting interspersed with high-adrenaline air combat grips you from start to finish. The feeling of excitement, fear, comradeship, honour, humanity and patriotism is wonderfully portrayed.
I quote a review from the dust jacket from Sir John Squire in "The Illustrated London News": "The senses of beauty, of humour and of compassion are always with him, and a rare gift of clean, clear English...The whole book is so decent and modest and brave and gay that it seems almost vulgar to mention the fact."