Students of coaching and coaches need the proper resources in order to enhance their practice. This handbook is an interdisciplinary collection of coaching theory and practice by over twenty practitioners from across five countries. It provides overview of all the theoretical constructs that are used in current coaching practices, and spans theories ranging from adult psychology to self-help. With summaries of theoretical traditions related to coaching and concrete applications, the book is ideal for coaches who want to better understand their practice, expand their toolkit, and increase their credibility.