The Autobiography of the Most Lethal Sniper in US Miitary History. From 1999 to 2009, US Navy Seal Chris Kyle recorded the most career sniper kills in United States military history. Kyle earned legendary status among his fellow SEALs, Marines, and US Army soldiers, whom he protected with deadly accuracy from rooftops and stealth positions. This is a special movie tie- in edition of the no 1 bestselling memoir by the late Chris kyle including brand new material about the making of the film and an insert featuring stills from the movie.