The Times notices . . .

While books about the military and military history have a long track record in both nonfiction and fiction, some publishers said the genre had never been as visible or popular as it is now. 

Story here.

American Sniper does a couple of things that those books didn't, most especially telling the family's story and talking in great and candid about the toll being a warrior took on Chris and Taya's marriage. That's going to be de rigueur going forward.