William J. Claxton 
Mastery of the Air [EPUB ebook] 

According to the Preface: ‘This book makes no pretence of going minutely into the technical and scientific sides of human flight: rather does it deal mainly
with the real achievements of pioneers who have helped to make aviation what it is to-day.’ According to Wikipedia: ‘William Gordon Claxton DSO, DFC & Bar (June 1, 1899–September 28, 1967) was a Canadian World War I flying ace credited with 37 victories. He became the leading ace in his squadron.’