Richard Elster was a scholar -- an outsider -- when he was called to a meeting with government war planners, asked to apply "ideas and principles to such matters as troop deployment and counterinsurgency."

We see Elster at the end of his service. He has retreated to the desert, "somewhere south of nowhere," in search of space and geologic time. There he is joined by a filmmaker, Jim Finley, intent on documenting his experience. Finley wants to persuade Elster to make a one-take film, Elster its single character -- "Just a man and a wall."

Weeks later, Elster's daughter Jessica visits -- an "otherworldly" woman from New York, who dramatically alters the dynamic of the story. The three of them talk, train their binoculars on the landscape and build an odd, tender intimacy, something like a family. Then a devastating event throws everything into question.

In this compact and powerful novel, it is finally a lingering human mystery that haunts the landscape of desert and mind.

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Don DeLillo is the author of two plays and thirteen novels, including Underworld, White Noise and, most recently, The Body Artist. He has won the National Book Award, the Jerusalem Prize and the Irish Times International Fiction Prize.