Includes bibliographical references and index.

The essence of restitution -- Themes and controversies -- The principle of unjust enrichment -- Enrichment -- At the expense of the claimant -- Principles underlying the recognition of the grounds of restitution -- Ignorance -- Mistake -- Compulsion -- Exploitation -- Necessity -- Failure of consideration -- Incapacity -- Restitution from public authorities -- General principles 5 -- Restitution for torts -- Restitution for breach of contract -- Restitution for equitable wrongdoing -- Criminal offences -- Establishing proprietary restitutionary claims -- Restitutionary claims and remedies to vindicate property rights -- The defence of bona fide purchase -- Fundamental principles and general bars -- Defences arising from changes in the defendant's circumstances -- Passing on and mitigation of loss -- Illegality -- Incapacity -- Limitation periods and laches.