I corresponded with the author several years ago and he kindly sent drafts of a couple of chapters covering 1915 to 1945 but I then missed that he had published the book. Now available in hard copy or as Kindle download. No 14 was the sole RAF squadron in Transjordan between the wars and carried out several programmes of aerial photography.
Napier, M. (2013)
Crusaders: The Exploits of 14 Squadron RFC & RAF 1915-45, London (Pen & Sword Books Ltd)