This book presents a series of new ideas in 16 chapters about trust in a variety of contexts and across disciplines. The chapters highlight the broad contexts to which trust research has been applied from e-commerce to on-line marketplaces, recommendation agents, school principals, project management, network security, trust games, investment in charitable organisations, and more. These varied contexts all show the same overall conclusion that trust is a central part of human decision making whether it applies to another person, social group, organisation, unknown market players, or even technology artefacts. Importantly, the book shows how trust can be built, and how these antecedents apply, overlapping, across scenarios from on-line marketplaces to novice school principals to charitable organisation, and to many other contexts.