This is another complex vision of two worlds, meeting in mutual incomprehension. It is completely different in both tone and content from Empire of Bones, but equally excellent and absorbing. Themes include moral responsibility, the nature of consciousness, the problem with anthropology, subjectivity versus objectivity, the observer affecting the observed etc. There are also two conflicting versions of Gaianism, which reflects contemporary issues about the best way to interact with our own planet. Liz Williams manages to deal with profound issues in a subtle & non-didactic way. The characters play out their drama with a sense of tragic inevitability, but the involvement of the offworld anthropologist affects both them and her. The technology is convincing as well. I loved the ideas in this book - the way the people of Mondhile interact with their landscape, the descriptions of their world and its history. The multiple-perspective narrative is great too, because you get the viewpoints of all the different characters. Highly recommended.