I found an interesting book in a used bookshop written in 1916 by an author with the pseudonym of "Contact" called "An Airman's Outings". It was basically diary entries of an observer in the Royal Flying Corps documenting his experiences as his squadron was deployed from England to France and covered progression from pusher planes to two-seat scout planes. He detailed things like how bombing planes were accompanied by squadron fighters to their targets, and then the fighters were turned loose to hunt for enemy fighters rather than follow the bombers home. Eventually the author suffered a knee injury during a crash landing (behind friendly lines) and was sent thru the hospital system in France and back to England. It's interesting that the author obfusicated details of locations in order to get around military censorship. Because it was full of fresh details of the WW I air war rather than being filtered by time, the recollections were very vivid.