Tom Clancy Shadow State (A Jack Ryan Jr. Novel) by Tom Clancy ,M.P. Woodward 

The vibrant economy of the new Vietnam is a shiny lure for Western capital. Companies are racing to uncover ideal opportunities. Not wanting to be left behind, Hendley Associates has sent their best analyst, Jack Ryan, Jr., to mine for investment gold. And he may have found some in a rare earth mining company—GeoTech.

But a trip with a Hendley colleague to the Highlands to observe the company’s operations takes a treacherous turn when their helicopter is shot down. Some things haven’t changed, and Vietnam is still the plaything of powerful neighbors. The Chinese are determined to keep Jack from finding the truth about what exactly is being processed at the isolated factory.

Now Jack is in a race for his life. He’s got to stay one step ahead of a pack of killers while supporting his wounded friend. He’ll get no help from the government, because in the jungle, it’s the shadow state that rules.