I just read the "Prolog" to this today... an interesting setup, delivered quite capably. The mystery of the andat is an attractive one, and Otah is a character I want to follow for the rest of the novel.
Interesting to note: This chapter bears some similarities to the prologue chapter of another great "Shadow" novel (The Shadow of the Torturer, by Gene Wolfe), which itself unfolded into a quartet of similar length (The Book of the New Sun). In both books, the main character is a young adolescent raised as more-or-less orphan in a strict, highly ordered monastic environment wherein a propensity for cruelty makes its way into both characters as a result of the system they've been brought up in. Both escape this order after being unable to resist showing mercy, though, and they strike out on their own. I wonder if there will be any more similarities (or indeed intertexts) with that Wolfean masterpiece... I am most intrigued.