Italicized print is commonly used in non-fiction text to show importance of something.
Bold print is used to emphasize somethings importance.
In non-fiction text there are no opinions just facts!
American sniper is a non-fiction book based on a true story that really happened. I'ts was about one of the greatest marines to ever go over and fight for our country they have recorded at least 300 kills but there could be more. He had PTSD and it really took a toll on him. When he was helping another Fellow soldier that was suffering form it the dude went crazy and killed him.