Book excerpt: 'The Effective Change Manager' is designed for change management practitioners, employers, authors, academics and anyone with an interest in the evolving professional discipline of change management. The first edition, 'The Change Management Body of Knowledge (CMBoK©)', drew on the experience of more than six hundred change management professionals in thirty countries. This second edition has grown that base to over 900 contributors and reviewers. 'The Effective Change Manager' describes the underpinning knowledge areas that change managers must know and understand to be effective in their change practice. It also describes the evolution of the change management practice as it starts to mature. The Change Management Institute operates as a global leader in strengthening, connecting and advancing the change management profession. It is committed to assisting members in developing Capability, Credibility and Connections in their pursuit of professional excellence. The Change Management Institute is an independent professional organization that is uniquely positioned to promote and advance the interests of Change Management.