If you are looking into change, then I would seriously recommend you read this book.There are many books on change, many of which pronounce on a miracle method to make change happen and stick.
However, this book does not pretend to have the answer and the author skillfully critiques various models, and guru's, on change, coming to the conclusion that change is far more complex than the various frameworks out there would have us believe.
And whilst this message may not sound palletable to the manager who wants to think that the answer exists out there, somewhere, then all the more reason to read the book, think about the critique being provided and make your own mind up!
I read this book whilst writing my MBA assignment on change, and it 'blew my mind away'. I have started to think about the challenges in my day-job in a completely different light.
The only reason I didn't give it a 5 is that I found the last few pages hard work - but I think that this reflects the complexity of the topic (and probably my intellect) rather than the skill and profesionalism of the author.
Re. the style of writing: I particularly like the fact that the author regularly takes a reality check on his thinking, rather than getting carried away with his own brilliance.