'' 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
September 11 attacks
September 11 attacks
Targeted Killing in International Law