A few: + "Pitch Anything": he presents an algorithm for pitching your deal or idea at the start of a negotiation. His "three forces" approach works really well

A few: + "Pitch Anything": he presents an algorithm for pitching your deal or idea at the start of a negotiation. His "three forces" approach works really well when done correctly and I use it for a lot of our enterprise sales. + "The Pyramid Principle": not really about negotiations, but corporate communication in general. I find a lot of technical folks get stuck "in the weeds" when negotiating or presenting and this provides strategies to get away from that. Senior executives or whoever you're negotiating with rarely cares about the details at the start of a conversation. Structure accordingly. + "How to Win Friends and Influence People": not really negotiations but I find 99% of our negotiations go well when we have good relationships and rapport with those we're negotiating with. Showing an interest and human appreciation for those you're talking to is crucial. Good luck!