Targeted Killing in International Law is a book about the legality of targeted killing, written by Nils Melzer. It was first published by Oxford University Press in May 2008. The book explores the history of targeted killing as a government strategy by multiple countries including the United States, the United Kingdom, Israel, Switzerland and Germany; for both military and law enforcement purposes. Melzer argues that directly after the September 11 attacks in the United States, perceptions of the tactic became more positive.