Part political disquisition, part travel journal, part self-exploration, Seek is a collection of essays and articles in which Denis Johnson essentially takes on the world. And not an obliging, easygoing world either; but rather one in which horror and beauty exist in such proximity that they might well be interchangeable. Where violence and poverty and moral transgression go unchecked, even unnoticed. A world of such wild, rocketing energy that, grasping it, anything at all is possible.

Whether traveling through war-ravaged Liberia, mingling with the crowds at a Christian...