Wings of War was a longer series (27 volumes) publised in the late 80's and early 90's. These volumes cover various types of military aviation; and though there is some overlap with this series and some of the other series about wars, there is some good information.
Like Classics of the Civil War, each of these volumes is a reprint of an older book, and they were all written by aviators. Probably the most interesting volume is 'Fighting the Flying Circus' which was written by Eddie Rickenbacker, a famous flying ace. It's interesting to read about dogfighting and hearing it described by someone who was there.
Watch out! There is a 2nd edition of many of these books and the covers and bindings don't match. If you want all of your set to match, make sure they are all the same edition!
I have found out that the two volumes "Falling Through Space" and "The Last Enemy" are actually the same; it looks like the Americans printed one title and the Europeans printed the other. "Falling through Space" was printed in the US while due to copyright issues the international series printed "The Last Enemy". I have left both titles in the listing here but I have only counted them once in the volume count - there are 26 total volumes, not 27.