To better understand the heterogeneity of the international online intermediary liability regime, The Oxford Handbook of Intermediary Liability Online is designed to provide a comprehensive, authoritative and 'state-of-the-art' discussion of by highlighting emerging trends. This book discusses fundamental legal issues in intermediary liability online, while also describing advancement in intermediary liability theory and identifying recent policy trends. Sections I and II provide a taxonomy of internet platforms, a general discussion of possible basis for liability and remedies, while putting into context intermediary liability regulation with fundamental rights and the ethical implications of the intermediaries' role. Section III presents a jurisdictional overview discussing intermediary liability safe harbour arrangements and highlighting issues with systemic fragmentation and miscellaneous inconsistent approaches. Mapping online intermediary liability worldwide entails the review of a wide-ranging topic, stretching into many different areas of law and domain-specific solutions. Section IV provides an overview of intermediate liability for copyright, trademark, and privacy infringement, together with Internet platforms' obligations and liabilities for defamation, hate and dangerous speech. Section V reviews intermediary liability enforcement strategies by focusing on emerging trends, including proactive monitoring obligations across the entire spectrum of intermediary liability subject matters, blocking orders against innocent third parties, and the emergence of administrative enforcement of intermediary liability online. In addition, Section VI discusses an additional core emerging trend in intermediary liability enforcement: voluntary measures and private ordering. Finally, international private law issues are addressed in Section VII with special emphasis on the international struggle over Internet jurisdiction and extra-territorial enforcement of intermediaries' obligations.