Davies is one of the writers of the book series Airlines of..... Out of that series' three books, Davies wrote Airlines of Asia, and Airlines of Latin America. Airlines of North America, the only book of that series in which Davies didn't work, was written by Bob Shives and Bill Thompson.
He also is responsible, alongside artist Mike Machat, for the series of books titles (Airline's name)...an Airline And it's Fleet, where he dedicates to writing about a certain airline's history and about the history of each plane that flew for that certain airline. Among the airlines he has portrayed in his an Airline and it's Fleet series are Pan Am, Delta Airlines, Lufthansa, Aeroflot, Saudi Arabian Airlines and TAM.
Mr. Davies is also a honor member of three aeronautical societies.