|| #1 New York Times bestselling author Clive Cussler 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. And if Pitt and his buddy Al Giordino aren't careful, the very same fate may await them...and the world.