Of all seven Cradle books that have been released so far, Ghostwater was my favorite. This novel delivered on all of the promise that I perceived when I read the first book. It has the most robust character development of the series so far, digs into the technical details of the magic system, instead of just building out to the next level, and it gives insight into some fascinating aspects of the world and the story that have only been alluded to before. Perhaps most strikingly, it is drastically more imaginative than other books in the series, which is a testament more to the level of imagination involved here, than it is an insult to the imaginative level of the other books.
Looking back, I realize that I kind of blasted Blackflame. I stand by my critiques, but it really was a book worth reading, and I certainly wouldn't want its possible missteps to dissuade you from reading Skysworn, because this fourth book in the Cradle series was exactly what the series needed.
Fantasy has been, in recent years, criticized for being too series-dominant. Few authors write stand-alone fantasy novels, and instead you end up with every time you read a new book you end up embroiled in yet another trilogy, of six book series. I suppose that can be frustrating...but not in this case. After reading Unsouled and Soulsmith, I was glad there was another book to read in the Cradle series.