Third volume of a four-book series, this novel is basically one long battle with some progress with Roo's and Erik's individual stories. Revelations and intrigue abound with some further character development.
It's worth reading the previous two volumes to fully comprehend what this book is about and, although not a great fan of books about battles and fighting, I found it important to see it through to the end (640 pages plus). The fourth part awaits.