Hi,
This is a book for young people (published in 1958) in the "Great Stories of Canada" series. The cover is by William Wheeler, who also did the charming black and white sketches that illustrate the book. The cover is a very accurate depiction of Capt. Hank Burden's SE5a C'1096 of 56 Squadron - done some 37 years before
High in the Empty Blue came out!