Getting to yes : negotiating agreement without giving in

"Since it was first published in 1981 Getting to Yes has become a central book in the Business Canon: the key text on the psychology of negotiation. Its message of "principled negotiations"--finding acceptable compromise by determining which needs are fixed and which are flexible for negotiating parties--has influenced generations of businesspeople, lawyers, educators and anyone who has sought to achieve a win-win situation in arriving at an agre...