No Easy Day: The Firsthand Account of the Mission that Killed Osama bin Laden (2012) is a military memoir by "Mark Owen", the pseudonym of a former member of the United States Naval Special Warfare Development Group (DEVGRU) who participated in the mission that resulted in the death of Osama bin Laden. The book details Owen's career with DEVGRU, including several combat missions with which he participated with the unit. At least half of the book focuses on Owen's participation in the mission that killed bin Laden.