This volume provides a high-quality and concise overview of the current state and new developments in the dynamic field of leadership research. The focus is on the claim of timeliness. It consciously refrains from presenting classical concepts and findings that can be found in most textbooks. All contributions have been written by recognized experts who are actively researching in the field of leadership. The 44 individual contributions are thematically grouped for better orientation and are distributed across eight areas: current concepts (e.g., authentic, ethical, and transformational leadership), the leadership process, impact and effectiveness, negative aspects of leadership (e.g., Machiavellianism), individual prerequisites, leadership development, new demands and current fields (e.g., diversity), and new methodologies.