Probably the best of the Rainshadow Island series, but it's really not as much about Rainshadow as about Arcane and "the formula". A continuation of the Arcane/Harmony threads. Which I prefer; I thought she got a little off track with Rainshadow.
I liked the characters, although the bad guys were not very well drawn. The plot moved along pretty quickly. They didn't fall into bed too quickly and there were only two, tasteful sex scenes.
I enjoyed it enough to probably read it again some time.