"This ambitious book grapples with ongoing debates on the structure of unjust enrichment. It argues that while unjust enrichment has the function of reversing defective enrichments, there is scope for normative pluralism in how the law achieves this. Drawing on comparative material from Germany, Scotland and South Africa the book argues for a legal framework which combines elements of the absence of basis and unjust factors approaches. It assesses how that structure can be mapped against the causes of action that make up unjust enrichment, and concludes with a treatment of defences"--