No Easy Day: The Firsthand Account of the Mission that Killed Osama bin Laden (2012) is a military memoir by Matt Bissonnette under the pen name Mark Owen, 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 in which he participated with the unit.