"This book is in the nature of a sequel to my former book, Air power and war rights, published in 1924, or rather to a section of that book. It deals ... with a subject already dealt with in chapters VIII. to XI. (chapter I. being also relevant, in parts) of the earlier book, and those chapters and the present book may be regarded as ... the first and second volumes of a ... treatise on air bombardment."--Pref.