Mark. T. Sullivan is the author of "Labyrinth, " the book "Publishers Weekly" called ?one of the most exciting yarns of the millennium?; "The Purification Ceremony, " voted one of the hundred best books of 1997 by the "Los Angeles Times;" and "The Fall Line, " a "New York Times" Notable Book of the Year. Twice nominated for a Pulitzer Prize for investigative journalism, he lives in Bozeman, Montana.