Chris Voss, a former FBI lead international kidnapping negotiator, shares his insights on negotiation in his book Never Split the Difference. Voss argues that effective negotiation is rooted in understanding human psychology and utilizing emotional intelligence. He outlines various tactics, including active listening, labeling, and calibrated questions, to establish rapport, build trust, and persuade the other party. The book emphasizes the importance of empathy, recognizing that "yes" is not enough for a successful negotiation; it requires understanding the "how" behind the agreement. It also examines different types of negotiators and their specific characteristics. Voss's techniques are applicable to various situations, from high-stakes hostage negotiations to everyday interactions like purchasing a car or negotiating a raise.