Yes, 5 full stars for this one because it's everything I want in a fantasy book. I will explain.
I don't read fantasy and sci-fi because I like magic or space ships or laser swords or what have you. I read fantasy and sci-fi because I want to see something new, and there's no other genre that allows this much freedom of imagination, this much flexibility and bending of reality and this much room for "what ifs". The genres are ripe with tropes and cliches even so, and I'm at that point where it pains me to have to read again through a story about the noble hearted what's-his-face who saves the land of medieval-Europe-plus-elves-and-dragons with the help of the wise mentor and the pretty princess. Show me something else, something truly weird, I say! And N. K. Jemisin delivered.
Let there be a world wracked by earthquakes and volcano eruptions, she says, restless and hostile. Let there be apocalypse-level events every hundred years or so. Let this world be inhabited by people who believe the Earth hates them, who value survival above all else, and have organized their society around making sure some of them will make it through the years of darkness, and famine, and poisonous air and water that follow such geologic disasters. Let there be among them those who have the power to control the earthquakes, to start and stop them at will, and let that society hate them, while doing their best to exploit them at the same time. Let there be another sentient species, strange creatures of stone whose motivations are unknown, who share this world with humans.
Then come the the details. The mysterious ruins of the many civilizations that came before this one, some considerably more advanced. Their artifacts endure to this day, their purpose unknown and maybe unknowable now that their makers have been dead for thousands of years. The harshness and ruthlessness of a society living on the brink of extinction, where value is based on usefulness and where, come Seasonal Law, those deemed useless are left to die in the wastelands. The purely utilitarian approach to building in a world where a balcony is unquestionable proof of foolishness or privilege, where decorations are a waste of time and resources since they'll be wiped out in a few years without fail. The surprisingly advanced science, focused - unsurprisingly - on geology, chemistry and physics. The hatred and exploitation of the orogenes, those who have power over the earth itself, by a society that both fears them and desperately needs them if it is to survive. The secrets and the lies and the rewriting of history and the suppression of lore by those who want to keep the orogenes willing slaves. The horrifying abuse, and the inescapable brainwashing, but the training and education too. A system meant to make them more powerful and more powerless at the same time so that it may better make use of them.
And then Jemisin pushes further. She goes so far out of the medieval Europe setting that she ends up on the Equator. She makes the other sentient race truly alien, as a different sentience should be, lest you end up with just stranger looking humans. She makes the humans different races, and *gasp* doesn't put the paler one in charge. Just as the characters span the gradients and combinations of human races, they span human sexuality too, from straight to gay with blurry boundaries all over the place. There's love and family and sex, but they're not the kind of relationships you're used to. Why should they be? This is not our world with some magic, mythical creatures, and sword fighting mixed in. This is something else. Something new.
And yet, as you read, you get the feeling that this could be our world with some magic and some mythical creatures mixed in. You get the feeling that it was this sort of world at some point, and then something maybe went wrong, and everything had to change, to adapt, and this is the inevitable result. The world is strange, but it's not strangeness for strangeness's sake. It all makes sense, everything fits together, and while you can see that some things could be different, you understand perfectly well why they're not. It's like a gnarled and twisted tree growing on a rocky windswept mountain top. It's not like other trees, but not because someone decided to take an ax to it and make it as different looking as possible. No, once the seed was planted, there simply was no other way it could grow.
I can't say more, especially about the characters and the story line, without spoilers, even though I feel I could rant about this book for days on end. Go read it. I can't begin to imagine the level of skill required to create a world so different, and then make it feel so real. N.K. Jemisin deserves your attention.