Saving Fish From Drowning (2006) by Amy Tan is a novel I read about a year or so ago. I remember thinking it was based on personal experience - a memorable trip taken a group of Americans to Myanmar, their getting separated from each other, and their resulting contact with some of the embattled hilltribe people there.
The book enters the world of the hilltribe groups trying to survive under the rule of a harsh regime intent on destroying them.