Most negotiation advice is incomplete. Some of it is outdated. Much of it is contradictory. One method tells you to claim value. Another tells you to create it. One says push harder. Another says build trust. One focuses on tactics. Another on relationships. So what should a serious business leader actually do when the stakes are real? In The High-Value Negotiation, Dr. Stéphane Royer cuts through the noise. Drawing on 400 years of literature, 40 of the most influential negotiation methods, and 250 recent scientific studies, he reveals what truly works, what does not, and why. The result is a clear, practical, and science-based framework for negotiating better deals, making better decisions, and building stronger business relationships. This is not a book of tricks. It is a method for leaders, buyers, and business professionals who cannot afford vague advice, costly concessions, or fragile agreements. If you negotiate with clients, suppliers, partners, or internal stakeholders, this book will change the way you think, prepare, and act. Better deals. Better decisions. Better relationships. Grounded in science. Applied in business.