The Law of Restitution is now firmly established as a distinct branch of the law of obligations. Yet for much of the past 25 years its status has been the subject of debate both in the courts and in academia and there are those who still regard it with suspicion. This is therefore an appropriate time to publish the collected essays of a scholar who has made a significant contribution to the study of restitution and who has established a distinctive position on many of its most keenly disputed controversies. For this collection the author has chosen a number of previously published and influential papers which he has selectively revised and updated, together with a number of completely new papers which present his latest views on a range of issues central to the law of restitution.