This beautifully illustrated book provides information on the air arms of the nations which took part in aerial warfare during the First World War featuring the Aces and their mounts. The war was a global conflict with 57 nations involved, but with aviation being in its infancy only eight nations had a major air arm to their fighting Services. The Allies: Britain, America, Italy, Belgium, France, and Russia and then the Central Powers comprising Germany and Austria-Hungary. This book is not intended to be comprehensive, for to provide such a work would require many volumes totaling thousands of pages. Instead this should be viewed as a relatively detailed overview; a general introduction to the topic of military aviation in the First World War. The aim has been to produce a well-illustrated book to maintain the interest of the reader with some short biographies of the leading Aces and basic information on the aircraft types used, and their development during the First World War. Furthermore, this book focuses on the air arms initially developed by the respective armies, and therefore the air arms of the navies, although fleetingly touched upon, are not dealt with in much detail. To provide reasonable coverage for the Royal Naval Air Service alone would require a separate and substantial additional volume. In a similar manner, although Zeppelins, other airships and balloons are mentioned and illustrated, little detail is given. The book contains details of the top Aces for each nation and in extensive illustration sections provides an extensive summary of the aircraft flown. While much of the focus is on the Aces, the book provides information on the aircraft flown and also has a separate illustrated section on Manfred von Richthofen and his "flying circus."