Book excerpt: For undergraduate and graduate-level courses in leadership. An exploration of what makes an effective leader Leadership in Organizations, 9th Edition provides a balance of theory and practice as it covers the major theories and research on leadership and managerial effectiveness in formal organisations. Rather than detailing an endless series of studies or prescribing exactly how leaders must operate, it sticks to the major findings and offers recommendations for improving managerial effectiveness. Using this approach, readers understand the implications of their decisions and can determine the best courses of action specific to the situation. With new examples, citations, and guidelines for better clarity and presentation, the text is a relevant and useful tool for students who expect to become managers in the near future.