Smith tells the familiar story of a young man who flunked out of college, sampled the 1960s counterculture and found himself first in the army, then in Vietnam. For Smith, the war was a theater of the absurd whose only meaning was survival. His narrative of low-altitude, high-risk operations in 1969-70 replicates that of others: initial confusion giving way first to proficiency and pleasure in stalking and killing anonymous enemies, later to a sense that both his skill and his luck are running out. Gritty enough to appeal to adventure fans, this memoir makes a useful contribution to a subject, American helicopter pilots in Vietnam, whose recorded history is largely still in its anecdotal stage.