Book excerpt: Collaborative working is an established feature of the public, business and third sector environments, but its effectiveness can be hampered by complex structural and personal variants. This original book explores the influence of agency through the role of individual actors in collaborative working processes, known as boundary spanners. It examines the different aspects of the boundary spanner's role and discusses the skills, abilities, and experience that are necessary. It will be of interest to academics, researchers and students interested in this field of study, and provides learning for policy makers and practitioners active in the fields of collaboration.