"Getting to Yes" is a negotiation book by Roger Fisher, William Ury, and Bruce Patton. It introduces the concept of principled negotiation, which focuses on mutual interests rather than positions. The authors emphasize the importance of separating people from the problem, allowing negotiators to collaborate effectively and reach agreements that satisfy both parties. The book outlines four key principles: focusing on interests, generating options for mutual gain, using objective criteria, and ensuring that the negotiation process is fair. By applying these principles, individuals can achieve better outcomes in negotiations, fostering cooperation and reducing conflict.