The Tombs

This is an okay book co-written by Clive Cussler and Thomas Perry. Husband-and-wife team Sam and Remi Fargo are intrigued when an archaeologist friend requests their help excavating a top secret historical site. What they find will set them on a hunt for a prize greater than they could ever imagine. The clues point to the hidden tomb of Attila the Hun, the High King who was reportedly buried with a vast fortune of gold and jewels. The Fargos find themselves pitted against a group of treasure hunters, a cunning Russian businessman, and a ruthless Hungarian.

This is the fourth novel in the series.