Influence: Science and Practice is a book that helps people understand how to influence or persuade other people. In the book, the authors explain how different kinds of communication and behavior can be used to influence people, like how tone and body language can be used to show respect and trust. They also explain how to read people's reactions and reactions to get an idea of what they are thinking or how they feel. Finally, they explain how to effectively use different techniques to influence others, like negotiating, speaking persuasively, and resolving conflicts.