Offering the perfect balance of theory and practical skills, this market-leading text equips students to make reasoned and effective communication decisions. Recognized for its ability to help students understand the crucial connection between theory and practice, the Ninth Edition includes a new feature called "Ask the Researcher" in which renowned researchers provide practical, and sometimes provocative, answers to questions often raised by students in the course. An entirely new chapter Unit 22 "Interpersonal Communication and Relationships in the Workplace" extends DeVito's trademark coverage of interpersonal relationships into the workplace. Further supporting the text's mission to provide students with an interactive and engaging introduction to interpersonal communication, the Ninth Edition features an exciting new integrated text and technology learning system. Contextually-placed web icons in the text's margins direct students to the book's Companion Website where they engage in interactive exercises or simulations that help them gain a better understanding of concepts presented in the text. Superior coverage of cultural diversity, expanded coverage of ethics, and new discussions of the effects of technology make The Interpersonal Communication Book, Ninth Edition, the best choice for preparing students to communicate successfully in today's world.