This is well written with all the themes you would expect in a book on internal communications, and a few more besides. It is drawn on years of award-winning practice in internal communications and other PR disciplines. The authors both know the subject first hand, and it shows in their understanding of the subject and the examples they use. I should declare one interest: I do know both authors well.
If it seems to some this is overly British in its orientation, I am surprised. The authors draw on genuinely global experience. Perhaps it is just not insularly American?
On the whole it is a good read, though it probably needs updating to take greater account of social media trends, which continue to change all aspects of PR.