Oh, yes, this is exactly what you want and hope for from a Duncan. It has two of my favourite Duncanisms in spades: first, the trials or adventures of a youth, and second, the devious machinations of a monarch or other important personage. These are so typical of many of "his" works that I have read that they are a joy to behold and are harbingers of good, good things to come.
I did struggle a little at the start, because neither the era nor the locale is native to my experience, but I soon enough got caught up, carried in and swept away by the story.The climactic fight was superbly spun, in fact chapters five through eight of part eight all made for very tense reading. I feel confident to say we're established and ready for further adventures, although exactly what the overall picture is as yet remains unclear to me. I feel as if I've missed something, thinking back, but I can't quite put my finger on what. Ahead with book 2!