Never Split the Difference: Negotiating As If Your Life Depended On It, by Chris Voss.
A former international hostage negotiator for the FBI uses real-life stories to explain how to succeed in any negotiation. The fascinating examples and science-backed research make this a great read for anyone that wants to work more effectively with people in negotiations, to resolve conflict, or to lead teams more effectively. What differentiates this book from others on negotiation is the focus on using human psychology, emotional intelligence and empathy, skills that every leader needs to influence and engage.
Trust Factor: The Science of Creating High-Performance Companies by Paul Zak.
Trust in organizations is the secret sauce that creates high-performing team and happy, engaged employees. This book looks at the neuroscience of trust and offers many practical strategies for building trust in your own teams. A must-read for any leader who wants to embody greater trust.