by Arbor House, $10.95. Sgt. Buell Docker is in charge of Dog Battery’s Gun Section Eight, which consists of fifteen men, one jeep, two trucks, and a radio rig that can pick up almost anything except headquarters. And, of course, there are the guns. The outfit is adrift on the eastern fringe of what turns out to be the Battle of the Bulge. Out of this simple circumstance, Mr. McGivern has created a war novel with believable characters, varied action, continuous suspense, and a conclusion that shifts, unexpectedly but with good reason, from physical action to a moral confrontation with implications that carry beyond its military setting. Altogether a remarkably fine book..