Intellectual property (IP) violations remain a global concern. This is reflected, inter alia, in a constant high demand for IP enforcement-related technical assistance addressed to WIPO by its Member States. Within the mandate of the Advisory Committee on Enforcement (ACE), WIPO services include legislative advice, specialized training as well as educational and awareness programs, seeking to assist Member States in further developing effective and balanced IP enforcement systems, in the interest of socio-economic development and consumer protection. In this context, Member States continuously emphasize the need for improved access to case law developments relating to IP enforcement. In response to this demand, the Honorable Justice Harms, former Deputy President of the Supreme Court of Appeal of South Africa and renowned international expert in the field, was asked to prepare the WIPO Case Book on the Enforcement of IP Rights; the first edition focusing on common law jurisdictions, and the second covering both common and civil-law jurisdictions. The Case Book proved to be popular and an excellent training tool for the judiciary, law enforcement officials, attorneys and right holders. Building on this success, WIPO has requested Mr. Justice Harms to update and further develop this important publication. The present work is the third edition thereof.