I read all the classic negotiations books and think this one is the only one you need to read. IMO its core idea is NOT "how am I supposed to do that", as other

I read all the classic negotiations books and think this one is the only one you need to read. IMO its core idea is NOT "how am I supposed to do that", as other posters say, but the role of empathy and uncovering hidden information in high-stakes (or even regular) negotiations