We used 3-D Negotiation (https://amzn.to/2Kyvzxx https://amzn.to/2Kyvzxx) at my negotiation class at Harvard. What I liked is that it goes through what you shou

We used 3-D Negotiation (https://amzn.to/2Kyvzxx https://amzn.to/2Kyvzxx) at my negotiation class at Harvard. What I liked is that it goes through what you should do before sitting to negotiate. In particular, deal design and the setup of the negotiation. I have also heard great thing about Never Split the Difference (https://amzn.to/2KwiK6K https://amzn.to/2KwiK6K).