I have now read the final volume of Trudi Canavan's Age of the Five Trilogy, Voice of the Gods. As a whole, it isn't as good as her Black Magician Trilogy, but it's still pretty good.
As far as this book goes, it has it's good points and it's bad points. It does explain how come there is a set of ex-conjoined twins where one's male and one's female (the male had a sex change), though it's only briefly mentioned in passing almost as an afterthought (probably just to explain the blunder from the last book). The plot is pretty fast paced, and I love the characters. It's not particularly deep, but it is a fun read.
One thing I don't like is that the characters are all pretty dumb. Say you're a Circlian. You worship five gods, who killed all of the other gods off a hundred years ago or so. Now suddenly another religion, called the Pentadrians, pops up. They also worship exactly five gods. Everyone wonders where these five new gods come from, but no one (until almost the end of the last book) ever stops to think that maybe their the same gods, just playing some inscrutable godly games. Sheesh. I had that figured out before the end of the first book. I also had it figured out the the reason the gods hated the immortal Wilds is because immortals can become gods, but somehow this came as a shock to the characters.
It's a bit annoying, but it doesn't detract from my enjoyment of the story. I give Voice of the Gods four yo-yos.