Very excellent.

Ancient Egypt is a criminally underused setting, and Jemisin makes this particular take of it wonderfully foreign.

The world she makes is interesting and believable, the magic well thought out in its practice and effects. The characters of the book were all interesting and compelling in their own ways.

Jemisin strikes this great balance of amazingly inventive fantasy with vivid prose. Her writing, especially of characters, is positively in point.