Large-scale transformational change hadn't really been studied, written-about, or understood when these four pioneers took case as large as national railways and telecommunications monopolies. Reading "Agents of Change" is reading THE pioneering book by change agents and practitioners reflecting on their work. There are no formulae for change - no 7 easy steps, no 8 musts before breakfast - it was all being done afresh, no need to think out of the box when there is not box, no toolbox, and few tools. Thus the practitioners find themselves trying different techniques from fields near and far, psychology, and the still-incipient management fields. Not that it is ancient history: the practitioners are still with us, still practicing, leaders in the field, teaching and sharing what is relevant with a new generation of agents of change. The work has inspired a new generation of reflective change practitioners, not least the Change Leaders UK, a group of veterans of Oxford's Said Business School and HEC Paris, who have published two volumes of articles as of the date of this review.