Martin Limón’s fine series of military police procedurals, set in South Korea in the mid-1970s, features George Sueño and his sidekick, Ernie Bascom—U.S. Army Criminal Investigation Division agents who are the go-to guys when there’s a murder or some similarly sensitive issue regarding the military in the Land of the Morning Calm. The Line finds our heroes investigating the murder of a young Korean soldier whose body is found a few feet north of the line dividing North Korea from South. Technically, Sueño and Bascom shouldn’t have dragged the body back across the line into the South, but they’ve never been sticklers for details like that. When a suspect presents himself, the powers that be are eager to pin the murder on him. Sueño and Bascom think the whole thing is just a little too pat, however, and despite explicit orders to the contrary, they decide to delve into the matter. They find themselves caught up in a criminal enterprise that involves fraud, smuggling and perhaps human trafficking, plus the aforementioned murder. I have read every Limón book since 1992’s Jade Lady Burning, and I have every intention of continuing to do so; they are that good.