Responding to a growing understanding surrounding the unique knowledge and skill set of individuals with lived experience of mental health conditions, this book responds to a gap in current literature by exploring the role of peer support work through the four realms of theory, research, policy and practice with a particular focus on mental health discourses. Filled with practical case studies and guidance on the most effective approaches to peer support work, chapters support readers in building their knowledge of: The theoretical models of peer work including historical underpinnings, benefits and drawbacks, and the ontological, epistemological basis for lived experience as a knowledge sub-set. The research behind the value of experiential knowledge, models of peer support work, ethical dilemmas and how peer support work relates to traditional mental health discourse. The policy developments in relation to peer support work. Peer support work in practice, including work with families, support work specialisms and current guidance on best practice. A must-read read for those working within mental health services, this book provides a comprehensive guide to peer support work for mental health professionals, programme managers, peer support workers and service users.