This book addresses the key aspects of successfully designing and implementing mentoring programs. Complemented by practical tools, case studies, and checklists, it offers a pragmatic and forward-looking guide for effective mentoring. Mentoring can ideally meet the new demands of personnel development, such as learning in the workplace, individualized learning measures, and collaborative learning. Additionally, mentoring provides significant benefits for both the mentor and the organization. In the second edition, new case studies are presented, and the topic of evaluating mentoring programs is explored in greater depth. Furthermore, the integration of mentoring into sustainable personnel development systems is discussed.