Niall: I'm used to commercial-quality books, as my wife is in the business. I thought this one wasn't quite what it could have been, but I also think the goal, especially in keeping the photos smaller, was to place the emphasis on the written content. After all, Doak's first versions had no photography.
I'm not being as critical of this as John K seems to think I am; I quite like it and have read it thoroughly. I just think, for the price of the book, the layout might have been more sophisticated.
As for the "other" authors, Doak says all of the writing is his. So I suspect they provided notes and he utilized them. This is only really odd in places where they saw something that he hasn't seen. That I found slightly awkward.
And given that all you get are four numbers at the bottom of each, it is hard to get a real sense of the perspective of each reviewer. That's my take.