This book provides a brief examination of a decade of support for research targeted directly or indirectly at the field of participatory plant breeding. It begins with a review of the approach and key research questions, illustrated by brief reports on six diverse projects around the world. It examines accumulated project results in the light of expected outcomes. There follows a series of recommendations for future activities, based on the lessons learned over the past decade. The book concludes with a speculative look at future directions for research and policy on PPB as an integral part of a global agrobiodiversity agenda.