Passage of Arms: Eric Ambler

An Indian clerk, Girija Krishnan, sees the opportunity of his lifetime when he stumbles on an abandoned cache of arms hidden in the Malayan jungle. If he can sell the weapons, he will be able to achieve his lifelong dream of owning a bus company - although the penalty for gun-running is death. Soon his decision becomes the catalyst for a chain of events involving an entrepreneurial Chinese family, a corrupt Colonel and, finally, a naive couple of American tourists who find themselves horribly out of their depth.