That reference came out a few years back. I had been working on putting one together and then this popped up. I was a bit upset that it had pictures of items from my collection which could only have been culled from eBay. I stopped working on the one I had planned at that point.
In my interview with Jim Hanifin, we talked about this book. No one seems to know who the writer is. I've tried contacting him and never received a reply. Whoever it was never contacted Jim or anyone Jim knew who was with Western Airletter. The writer remains a mystery. If whomever wrote this happens to read this, please feel free to send me an email. I'd like to talk about the status of some of the material from Western Airletter and see if you have any idea where it has disappeared to or if, unfortunately, it is now lost to us.
It's a good reference (even if they did pirate the images
. The only other reference is the original Western Airletter catalogue produced by Jim Hanifin with Western Airletter Centre, along with their bulletins. I have all of those as well. You can find those listed on eBay from time to time.
I would look around for the book you are showing. You should be able to find it being sold for about half what the seller you have shown wants on eBay.