Now in its 4th edition, Work in the 21st Century: An Introduction to Industrial and Organizational Psychology is the most current, engaging, and highly regarded text for the industrial and organizational psychology course. The fourth edition retains the 14-chapter format and the 4-color design, which brings I-O psychology to life, especially with the use of newsworthy color photographs. Although recent I-O research provides a wealth of new material to explore, the book's length has been reduced in this edition by omitting, or streamlining the discussion of, less current material. The 4th edition presents many new topics, including social networking sites (e.g., Facebook) and the workplace, I-O psychologists' role in sustainable and environmentally conscious organizations, employee engagement, genetics and entrepreneurship, SIOP's new status as a consultative non-governmental organization (NGO) to the United Nations, and evidence-based I-O psychology. There is expanded coverage of many topics including international and cross-cultural issues, competency modeling, core self-evaluations, legal issues, entrepreneurial motivation, authentic leadership, personality-based job analysis, emotional intelligence, bullying, leader stereotypes, emotional labor, procedural justice in performance evaluations, and telecommuting.