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In the ancient darkness of a mammoth cave, a cosmic secret lies buried

Working late in a deserted lab, a researcher named Gregor makes the discovery of the century. Within the dingy mottled surface of a stone named "moon rock 66095" lies unparalleled superconductive property-a power which, if harnessed correctly, could solve the world's energy problem once and for all. But when his supervisor tries to take credit for the breakthrough, Gregor murders him and hides the rock safely inside Kentucky's Labyrinth Cave. And his supervisor will not be the last man to die before Earth learns the secrets of moon rock 66095.

When NASA organizes a team to retrieve the magnificent rock, world-class cavers Tom and Whitney Burke are the natural choices to lead the expedition. But Whitney is still shaken from a terrible caving accident, and lets her husband and daughter go without her. When tragedy strikes the expedition, however, she must overcome her fears in order to rescue her family, plunging into a cave so deep that she may never see daylight again.

ABOUT Mark T. Sullivan

  • BIOGRAPHY

    Mark T. Sullivan (b. 1958) is an author of thrillers. Born in a Boston suburb, he joined the Peace Corp after college, traveling to West Africa to live with a tribe of Saharan nomads. Upon returning to the United States, he took a job at Reuters, beginning a decade-long career in journalism that would eventually lead to a job as an investigative reporter for the San Diego Tribune.

    Sullivan spent the winter of 1990 living with a group of skiers in Utah and Wyoming, and used the experience as the foundation for his first novel, The Fall Line (1994). In 1995 he published Hard News, a thriller based on his work as a reporter, and a year later he released The Purification Ceremony, which won the WH Smith Award for Best New Talent. His most recent work is Private Games (2012), which he co-authored with James Patterson. Sullivan lives with his family in Montana, where he skis, hunts, and practices martial arts.