Inca Gold

Inca Gold - Clive Cussler Well paced adventure featuring Dirk Pitt and the NUMA team.
After rescuing some archaeologists, Dirk and Al Giordino find themselves tangled up with a group of antiquity thieves.
There's no secret organisation trying to take over or destroy the world in this one, and the story benefits from that.

Good cast of supporting characters and the tension is kept up throughout the book.