I think the review actually says that for people who are naturally manipulative the book doesn’t necessarily add much; which I can imagine.
The book actually explains quite well which negotiation tactics don’t work when faced with life and death situations (hostage negotiation) and goes on to explain which ones do and why they actually work better in everyday negotiations as well.
The book actually explains quite well which negotiation tactics don’t work when faced with life and death situations (hostage negotiation) and goes on to explain which ones do and why they actually work better in everyday negotiations as well.