The #1 New York Times bestselling author once again brings to life the heroism and guts that have made Dirk Pitt a legend in the world of adventure… A potential breakthrough discovery to reverse global warming…a series of unexplained deaths in British Columbia…a rash of international incidents between the United States and a longtime ally that threatens to erupt into a shooting war.  NUMA director Dirk Pitt and his children, Dirk. Jr. and Summer, know there's a connection—but they also know they have very little time to find it.   Their only real clue might just be a mysterious silvery mineral traced to a long-ago expedition in search of the fabled Northwest Passage. But no one survived from that doomed mission.
