This will be last post on the matter as I can see we're never going to agree on the subject
A couple of points though:
607 was really about the collective achievements of the bomber crews so not dissimilar.
Most authors would have some passion for a subject or find it engaging enough want to research and write a book about it. So any author wouldn't just be a gun for hire.
A couple of points though:
This book was, I believe, intended as a celebration of our collective achievements. The OP is right to a point about mutual back-slapping, but then again - so what?
607 was really about the collective achievements of the bomber crews so not dissimilar.
You could have it written by a neutral journalist or a writer, and they would be able to add comment and opinion, but that would be from the perspective of one person, rather than this format which has the perspective of over 40 individuals who were there.
Most authors would have some passion for a subject or find it engaging enough want to research and write a book about it. So any author wouldn't just be a gun for hire.