I've been thinking a lot about change management recently. I think about it a lot anyway, but at the moment I am preparing a presentation I'm giving next month.
Now, I don't mean to sound too pedantic or critical, but it's not a field guide at all, at least not in the sense that I understand by the term. It looks pretty, and there are lots of inspirational-sounding quotations, but no real strategic guidance.
So I guess whether it's useful or not will depend on what you need at the time. I've bookmarked it for those times when I need an inspirational quote about change. But if you're in a job where you need to bring about a fundamental change on a whole school level, or even on a smaller scale, I doubt that you'd find this of much use at all.