So what this series boils down to, in the end, is the redemptive power of love. But Berg's story is so original and interesting that the theme does not feel tired nor cliche-ridden at all.
Each book in the series has had unexpected plot twists, which Berg handles skillfully enough that they never feel like deus ex machina, nor were they obvious ones that could be seen from several chapters beforehand. Throughout the three books, there were always several avenues the characters could take to accomplish the final resolution.
The only obvious problem with the third novel was Karon's sending of Radele to protect Seri and Gerick. I saw his treachery coming from a mile away, so Karon certainly should have. Or rather, Berg left herself no other way for Gerick to get into trouble, so it was obvious Radele was pulling the strings. Yet, even here, Berg manages to surprise us because we have no idea exactly how Radele manages his traps until the end.
Of course good triumphs over evil. But the good people have to go through some hellacious crap, so the happy ending doesn't feel forced. In fact, I was cheering for the protags who had all had so much to overcome. *SPOILERS AHEAD*Seri is 41 years old when she finally has her family and her inheritance restored to her. In the sixteen years previous to that, she has endured seeing her husband tortured and executed for sorcery, believed her son was dead for ten years before finding him again,lived life as an impoverished outcast as punishment for marrying a sorcerer, lost family, friends, wealth and social position; and, finally, was able to use her intelligence and stubbornness in solving the puzzles put in her way after D'Nathiel's strange entry into her life. *END SPOILERS* I don't mind books with happy endings when the characters truly earned them, where they had a major hand in bringing their worlds and their personal lives to peace.
All in all, a very satisfying read, complex enough plotting and characterizations that I was not bored or insulted (I hate it when a writer treats me like I'm stupid), yet something I could read at night without having to twist my brain into a pretzel. "It's not Tolstoy" is definitely not an insult in this case.
I still hate how Berg names her places and characters, as if nobody would take them or her seriously unless the names were as bizarre and a'p'o's't'r'p'he-laden as possible. But that's the quibble of a geek who has a good idea what Mark Twain would have thought of Berg's pretentiousness. The multiple POV storytelling got annoying at times because the only distinctive voice was Paulo's; Gerick's was somewhat more like that of a sixteen-year-old, but the only way Berg seemed able to distinguish Karon's voice from Seri's was to give Karon some bizarre syntax or have him use words like "beauteous." He'd lived in Seri's world for a long time, so it didn't work for me. I have little patience for phony poetic diction.
ETA: I didn't know there was a fourth book. I'm anxious to pick up Gerick's story.