Legendary author Clive Cussler and Edgar Award winner Thomas Perry join forces for this fourth series novel starring married adventurers Sam and Remi Fargo. While excavating a secret historical site, Sam and Remi unearth clues that point to the location of Attila the Hun's tomb, which legend says holds a horde of gold and jewels. But they're not alone—a ruthless Hungarian who claims to be Attila's direct descendant will stop at nothing to beat them to the treasure.