Plunder of the Sun — David Dodge

ON THE TRAIL OF THE LOST TREASURE OF THE INCAS -- WITH EVERY FORTUNE HUNTER IN SOUTH AMERICA CLOSING IN!

Al Colby should never have agreed to smuggle the package from Chile to Peru. Now one man's dead, two beautiful women have betrayed him, and a couple of gunmen are hot on his trail. All because of an ancient Quechua manuscript pointing to the hiding place of a priceless hoard of gold, lost for centuries.

So the race is on -- by train, by plane, by motorboat and by mule -- first to find the treasure and then to escape with it alive...