A state-of-the-art compilation of theory, research, and practice in the field of youth mentoring. The first edition was recognized as “best edited book” by the Society for Research on Adolescence. The Second Edition features an increased focus on critical issues in evidence-based mentoring practice, including ethical issues, youth safety, mentor training, relationship terminations, and mentor-youth matching. It also includes several new chapters on emerging topics of importance in mentoring of youth, including the role of mentoring in prevention and in positive youth development interventions; social class issues in mentoring; group mentoring and mentoring for youth with mental health needs; children with incarcerated parents; and immigrant youth.