Floresta é o Nome do Mundo

I love Le Guin's writing but don't think this is up with her best. It's a very angry novella; raging against conolialism (obviously inspired by the Vietnam war). From the author's note at the beginning it sounds like it was written in a rush and that means the characters are one dimensional (especially the villain) and there isn't much structure to the story. The Athsean's dream culture is interesting though, and the final downbeat message is important. 

it's a fairly short and straightforward story about resistance to colonization, but embedded in it is a kind of complicated discussion about the legitimacy of violence. It seems like it was in part a commentary on the Vietnam War (which is even alluded to at one point).

Don Davidson is one of the more thoroughly unpleasant viewpoint characters I've read; fortunately he is meant to be villainous, & at any rate it's only from his point of view for about a third of the book. His motivation, worldview & actions are disturbing but accurate for a certain sort of man.