"an important contribution toward understanding collaboration." Voluntas "We know that agency can be key to collaborative success. Now thanks to this highly original, accessible and well-researched book, we have a much better understanding of who the key agents are, what they do and how they do it. A sound investment for policy makers, practitioners and academics." Helen Sullivan, Director, Centre for Public Policy, University of Melbourne, Australia "Partnership working has long been the holy grail of public services delivery, but has been addressed by endless structural reconfigurations. In this excellent book on the role and nature of 'boundary spanners', Williams shifts the focus onto the people who really make partnerships work effectively." Professor Bob Hudson, School of Applied Social Sciences, Durham University