Golden Triangle — Peter McCurtin

The last place in the world Rainey feels like visiting is Vietnam—as a Green Beret during the war, he’d been responsible for a lot of deaths, and he’s still a wanted man. But when a powerful Mafioso offers him a quarter of a million dollars to find his son, reported Missing in Action but apparently still alive somewhere within the lawless hellhole known as the Golden Triangle, Rainey decides to risk it.