"This book is a valuable contribution to the field. Erdman and Caffery present the logical combination of two powerful theories for change. It provides the clearest and most up-to-date statement on current thinking." -- Patricia Stevens, PhD, President, International Association of Marriage and Family Counselors"This book addresses, in an intriguing manner, the compelling overlap between two systems of thought that address the nature of interpersonal relationships and how these impact functioning throughout the lifespan." -- Mo Therese Hannah, PhD, Siena College"A timely exploration of how the two systems of thought might be combined. …does an excellent job reviewing the current state of play. In bringing together a range of informed and therapeutically talented contributors, the editors help re-unite two of psychology’s leading theories on the nature of interpersonal relationships, socio-emotional development and psychological change." -- David Howe, BSc, MA, PhD, PGCE, CQSW, University of East Anglia