This textbook provides a systematic exposition of EU contract law, including its foundations in EU primary law as well as details of the harmonization in secondary legislation. In the first part, the author discusses foundations in EU primary law, fundamental rights and fundamental freedoms, community competence for legislation in the area of contract law and the rules of conflicts of laws as provided by the Rome I Regulation. A chapter on consumers and businesses also discusses the harmonization concept. The second part focuses on general aspects of contract law: the prohibition of discrimination, rules on precontractual obligations, rights of withdrawal, contents and interpretation of contracts and judicial control of standard terms. In the third part, rules on specific types of contracts are discussed. The Consumer Sales Directive, the Consumer Credit Directive and the Package Travel Directive serve as examples to illustrate the authors conclusions.