The Ugly American raises good points on failures in American diplomacy and the lasting effects of imperialistic mindsets, but within a paranoid worldview. When I read it the first time, I was thirteen or fourteen, and I thought it was great. I’m not sure if I’d be so positive now, but I’d still recommend it for Americans who are thinking of living in other countries.
Or, if you’d like something more literary, try Chinua Achebe’s Things Fall Apart, or anything by John LeCarre.