The pulling power of Mitchell's name for this air-minded generation of readers was evidenced by the substantial sale of a scissors and paste biography, Gauvreau's Billy Mitchell (see report 1941 -- Page 392). Now comes a definitive study of Mitchell, not perhaps a definitive biography for the emphasis is away from his personal life, but a thorough-going, extensive and thoroughly readable history of Mitchell as ""pioneer of air power"". One might well say as prophet, challenger, and a creative force -- for he was all of these. Isaac Don Levine has had access to primary source material not hitherto available; he has approached a fascinating and dramatic character with sympathy, understanding, a scholar's viewpoint, and a fiery determination to marshall all facts and let them prove themselves in vindication of a man who is obviously his -- and countless others' -- hero. That Mitchell was pioneer of air power is self evident; that what alertness there has been-in making possible a rapid forging of the air arm into a weapon for offense-stems from the pressure he exerted throughout his life. His insistence on a separate air force, on a joint war council, these are subjects still challenging the best military brains, but Arnold and Rickenbacker, old friends and allies of Mitchell, are in the saddle, and the future will be Mitchell's finest memorial. Levine's book is solid reading, but the interest does not flag. If it gets the breaks it deserves, it should climb to big sales.