The first edition of this book, by Peter Gray and Owen Thetford, when published in 1962 earned world-wide acclaim as the most comprehensive reference on German combat aircraft of the First World War. The second revised edition incorporated a large proportion of new photographs, most of them never previously published. This new impression is a reprint of that edition. The entire text has been checked against original German sources, and over 500 aricraft are described and illustrated, covering two-seater fighters, multi-engined bombers, triplane and monoplane fighters, and seaplanes.