I really liked this. It's one of those books which I turned around and re-read immediately.
Prickly, tough 19-year-old Yeine Darr is summoned from her northerly home to Sky, the capitol city of her entire world, by its ruler: her grandfather, who means to make her his heir. Or, more accurately, one of his heirs, because there are already two others. Only one of them will ascend to rule the world, and Yeine, a young woman from a "barbarian" kingdom, isn't considered to have much of a chance against the other two in the vicious political games played in Sky. She discovers layers within layers of plots, involving deities that walk the earth, ancient magics, secrets about her own parents, and consequences that reach far beyond her own life.
The writing style alternates between beautifully mythic and wryly personal, as Yeine recounts her own actions along with the histories, literature, and myths she has read and heard. Yeine is very human, cool and determined on the outside, vulnerable and self-deprecating on the inside, with a core of passion that breaks through in both anger and love.
The horrors of what is considered entertainment among the decadents of Sky played very well against my own view of what's awful but might well be triggering for some. Also, some of the criticisms I've read of this seemed to be from people who take a more coldly logical view of things than I do, so a reader of the sort who is rarely overwhelmed by feelings might be exasperated by some aspects of this story.
(Read more about this book, including spoilers, here on my LJ.)