Trust is fundamental to everyday interactions and the functioning of society. How trust develops, or fails to develop, within contexts of severe mental illness is a pertinent topic for social scientists and healthcare professionals, not simply because it is an under-researched area but because heightened uncertainty and amplified vulnerability amidst psychosis represent a crucible of the conditions where trust becomes relevant. Grounded in research within this crucible, this book explores a number of questions which are central to contemporary theoretical debates around the nature of trust. The authors link these abstract concerns to empirical analysis, involving interviews with service-users, practitioners and managers. This book will appeal to anyone interested in the concept of trust, including social science researchers and students, as well as practitioners, managers and policy makers working with vulnerable people.