I've commented on the formulaic nature of this series, and to an extent that is present here as well. But I do really enjoy this book because, after years of seeing what atevi culture is like, and trying to understand atevi emotions and attitudes and motivations, here we finally get a good look at Mospheira, the island on which humans have lived for 200 years, separated by a strait from the atevi who won the War of the Landing. Mospheira is Bren Cameron's home - for Bren is a human, the paidhi-aiji, the go-between who represents humanity to the atevi government and the atevi to the human government.
One of the things I've really wished that C.J. Cherryh would do is show us more of Wilson, Bren's predecessor in the post. And here we get a little fulfillment of that wish. Wilson was the last of the traditional paidhiin, whose function was to maintain and build up the Mosphei'/Ragi dictionary (Ragi being the language of the predominant atevi ethnic group), oversee the slow release of human technology into atevi culture, and write scholarly papers. When Tabini, the current aiji - not quite a king, not exactly a president - came into office, he ordered Wilson back to Mospheira, and went through a succession of paidhiin until he found one who would talk to him, which none of the previous holders of the office had done. Indeed, the rules they operated under forbade actual conversation in Ragi - but Bren Cameron broke that rule and had actual conversations with Tabini.
In a couple of places in the series - including this book - we learn that Wilson was very "strange" after his decades on the mainland. And that seems natural. Even without conversing with atevi, the requirements of fitting into atevi culture would impose constraints upon a human being. There's one place, early on in the series (in Foreigner?), where we learn that Wilson was almost incapable of facial expression when he returned to Mospheira, because courtesy in atevi society requires impassivity except in intimate settings. In this book Wison is definitely not impassive - he expresses some very human emotion - and so I conclude that by now, years after he left office, the man has shed at least some of his atevi overlay. And we don't see his strangeness here so much as we see his inflexibility. Either unwilling or unable to comprehend that the very nature of the office has changed, he rails at Bren for not being a paidhi in the same way that Wilson did the job.
I still want to see more of Wilson. I would like to see more of Mospheira - not just the "bubble" in which Bren necessarily moves now, as a court official and lord in the atevi realm, but the island on which he grew up and for a while was able to visit as an ordinary citizen. Whether, at some point in the Foreigner series, Cherryh will give us that I don't know. I've read most if not all of the extant books, but I find in rereading them that there's a lot I don't remember (formulaic books blur in the memory). I hope she does. While the atevi are the dominant race on earth, there are several million humans on Mospheira, with their own culture, their own landscape...and their own Wilson.