This book offers the definitive and comprehensive statement of all aspects of the law of targeting. It is a 'one-stop shop' that answers all relevant questions in depth. It has been written in an open, accessible yet comprehensive style, and addresses both matters of established law and issues of topical controversy. The text explains the meanings of such terms as 'civilian', 'combatant', and 'military objective'. Chapters are devoted to the core targeting principles of distinction, discrimination, and proportionality, as well as to the relationship between targeting and the protection of the environment and of objects and persons entitled to special protection. New technologies are also covered, with chapters looking at attacks using unmanned platforms and a discussion of the issues arising from cyber warfare. The book also examines recent controversies and perceived ambiguities in the rules governing targeting, including the use of human shields, the level of care required in a bombing campaign, and the difficulties involved in determining whether someone is directly participating in hostilities. This book will be invaluable to all working in this contentious area of law.