I'm giving this 5 stars for concept and originality and 2 stars for execution. So call it 3 and a half. I spent a lot of time wishing to shake Ms Sinclair, or maybe just strangle her, for not producing the sci fi classic this should have been.
The basis of the plot is that an interstellar civilisation, destroyed by a plague, is now re-contacting cut-off planets. A team of medical doctors has arrived on the planet Nereis to research the source of the plague. The team members divide themselves between two Nereian peoples, but there is a politico-military struggle in progress. One side had been forced to move in on the lands of the Kayani because of a failure of their adaptation to the native toxins. The Kayani are fighting back. Then there is another landless people who have been enslaved by the Kayani, but want self-determination (I think). Just to further complicate matters, some of the members of the medical team have their own agenda.
There's some really interesting science and pseudo science in here, such as the adaptations people have been given to allow them to live on different planets, and the effect of their environment on their health and longevity. The medical team have some great tech, as well, such as skin reinforcement (integ), a mental communications network, and a prosthetic hand which is also a surgical kit.
What I really struggled with is the way characters speak (and think) in such a roundabout manner, alluding to the point rather than stating it outright, that I had to read things over two or three times, just to work out what they meant. After a while I gave up and tried to read it straight through, but then I couldn't grasp the characters' motivations and just lost track of why things were happening. It would have been okay if the story had been simpler and stayed in a single point of view, but this novel has a large cast of characters and several sub-plots, so the lack of clarity over why people were doing things totally mucked me up.
To quote one of her characters: "No matter how great a man's native gifts, they are useless if he cannot communicate." I suspect this has been said of Ms Sinclair, and, regretfully, it's still valid. There is genius in this book, but finding it is just too hard a slog.
I originally gave this 3 stars, but decided to up it to 4, solely on the basis of the bizarre sex scene featuring a one-armed paraplegic. Yes, really. Read it and see.