This is the third book in the 'Ius Commune Casebooks for the Common Law of Europe' series,developed for use throughout Europe and aimed at those who teach, learn or practice law with a comparative or European perspective. The book contains excerpts from legal commentaries, leading cases and legislation from the main legal traditions within Europe (English, French and German law), as well as the Netherlands, but also relying on the contribution of mixed legal systems such as those of Scotland and South Africa. Unjustified Enrichment concerns the law of restitution and contains a wide selection of extracts from the basic texts and commentaries. The materials are chosen and ordered so as to foster comparative study, prefaced by comparative introductions and complemented with annotations prepared by a multinational team. The whole Casebook is in English.