Maybe I'm getting jaded. I used to like these novels back some time ago, with the silly preposterous chases and the historical settings and artifacts. You get everything from a battleship turned into a monument turning its guns on the capital to the ghost of a WW1 flying ace strafing a U.S. Air Force base and getting revenge. I mean everything. The main character is a cross between Jacques Cousteau and Indiana Jones, except he has more sex appeal than James Bond. Everything's always very lurid, with the hero (Dirk Pitt) getting horribly upset and desiring revenge at the expense of the villain.
The plot doesn't make much sense, or really matter that much. In this instance, Pitt's vacationing at a lake in Oregon when a billionaire Chinese lunatic tries to use the lake as a dumping ground for useless illegal Chinese immigrants (I kid you not) and of course Pitt rescues them. It turns out that the government wants Pitt and his team to explore the billionaire's operations (by one of Cussler's patented preposterous coincidences) and so off we go.
There are many adventurous things in this book, chases involving boats, cars, submarines, ultralight gliders, and so forth. Gunfire and sex abound (though the sex is tastefully done, I will say that) and the humor is kind of lame.
If you're into this sort of thing I suppose this was fun. Somehow, I think I've reached my threshhold of disbelief.