Quentin has settled in as King and has built a family for himself. But Nimrood the Necromancer has returned, hungry for revenge. Nimrood kidnaps the Prince and Toli and stirs up the people of the realm against Quentin and Quentin's god. Quentin finds himself unexpectedly alone and descends into mad grief. Everything is being taken away from him: his son, his family, his friends, his faith. Will the promise of a new era indeed come to pass, or will it crumble like so much dust?
If you've read the first two books in the trilogy, you should have a pretty good idea what to expect right now. In fact, if you've read the above paragraph and can make an educated guess about the ending, you have the whole story. The most interesting thing about the whole book, for me, was seeing Quentin descend into madness. He's been so noble in both the previous books, pure in motive and in deed, that it was quite a change to see him raving at his friends and behaving very badly in general.
The main focus of the book, spiritually, is about how a new era of faith is built. There are a number of good discussions about faith, what it means to have faith, and the strange role the Most High takes compared to most gods. It can feel a bit like a sermon wrapped up in prose at times, but the points are good.
My main complaint, other than the book's straightforwardness, was that it never went into depth on certain things like Esme's marriage or Toli's role. Esme might not be telling anyone else what happened to her, but the narrative goes into her head often enough that it's frustrating not to get anything definite. Similarly, Toli has so little characterization that I'm left wondering at the end of the book if they ever did plan to get married.
If you liked the first two, read this one. If you didn't read the first two, best pick those up first, as this one explains nothing about the earlier books, despite Nimrood making his return. Recommended, with the same caveats that applied to the earlier books.