The Chronoliths

Scott Warden is a man haunted by the past-and soon to be haunted by the future.

In early twenty-first-century Thailand, Scott is an expatriate slacker. Then, one day, he inadvertently witnesses an impossible event: the violent appearance of a 200-foot stone pillar in the forested interior. Its arrival collapses trees for a quarter mile around its base, freezing ice out of the air and emitting a burst of ionizing radiation. It appears to be composed of an exotic form of matter. And the inscription chiseled into it commemorates a military victory--twenty years in the future.

The Chronoliths is a 2001 science fiction novel by American-Canadian writer Robert Charles Wilson. It was nominated for the 2002 Hugo Award for Best Novel and tied for the 2002 John W. Campbell Memorial Award for Best Science Fiction Novel.