This unique volume presents the core ideas of law and economics for audiences primarily familiar with civil law systems. Ejan Mackaay offers a comprehensive look at the essential points of economic reasoning, the Coase Theorem, and legal institutions such as intellectual property, extra-contractual civil liability and contracts. The book's structure mirrors the way law is taught in civil law countries, with structured presentations, references to civil code articles paired with non-technical explanations, and limited reliance on graphs. This English-language version builds on the success of the author's 2008 French-language textbook on law and economics from a civil law perspective. This pioneering volume fills a critical gap in the literature of law and economics, and will be an invaluable resource for lawyers and law students working in civil law systems.