This comprehensive yet accessible Research Handbook offers an expert guide to the key concepts, principles and debates in the modern law of unjust enrichment and restitution. Written by leading experts drawn from a wide range of common law, civilian and mixed jurisdictions, chapters cover the complex history, scope and philosophical foundations of the subject, its organisational structure, main liability principles, defences and remedies. Utilising a broad array of legal authority and academic commentary, contributors engage with the key concepts and debates in a way that offers a direct...