As the COVID-19 pandemic continues to take its toll, contractual parties have frequently faced significant impediments in performing their contractual obligations due to COVID-19 pandemic and government measures taken in response. This book - a comprehensive comparative examination of the impact of the COVID-19 pandemic on contractual performance - discusses the legal provisions and doctrines available to address these issues. The book examines under what circumstances COVID-19-related impediments may excuse contractual performance or lead to modification or termination of the affected contractual obligations in twelve representative civil and common law jurisdictions - the United States, England and Wales, Singapore, Brazil, Germany, France, Switzerland, Austria, Hong Kong, Costa Rica, China, and Russia. For each country, the book examines the following aspects in depth: - the relevant fundamental legal principles; - the various legal emergency valves available to an obligor to respond to COVID-19-related events; - any remedies available to the obligee; - selected examples for specific government measures related to particular types of contracts (e.g., construction, employment, lease agreements); and - how the legal framework applies in typical factual scenarios. As further legal and factual developments occur, and with further jurisdictions being added, this publication will continue to be updated both online and in print. -- Backside cover.