I recently reread this excellent trilogy. I didn't expect to enjoy it the second time, since the plot had so many twists to it. However, the second time through I realized how excellent the characterizations were.
In brief, the story revolves around Dain, an Eld/human who discovers he is actually the missing King of Nether. The interesting thing about the plot is that he feels little motivation to claim his crown, but circumstances keep pushing him to do so. During the book, he has to develop from a near-feral boy to a man who can deal with rebuilding a kingdom. This character progression is deftly and believably handled.
The trilogy has some unusual characteristics. First, it is not really a trilogy, but one book divided into three separate parts. The titles are very misleading, especially the first book, entitled "The Sword". Since the first book has two important swords, I didn't really find out which the title referred to until Volume 3. Second, the book ends suddenly, without resolving some key issues. The evil kingdom which wishes to overthrow Nether is undefeated, and Dain's relationship with his mother's people is unresolved. Third, the first hundred pages, which describe how Dain's father lost his kingdom and his life, are a bit slow going. However, the second time through, I was much more open to this long introduction; I felt that it showed the similarities between father and son - that they were both very human individuals whose ideals and responsibilities threatened to outstrip their abilities. Last, the romance was peculiar, in that there was no description of any romantic feelings, at least from Dain's point of view.
The unorthodox handling of the trilogy format may throw some people off, but I would highly recommend these books. It is a trilogy which screams for a follow-up volume, which hopefully will be written!