Speaking of errata, p. 110 refers to the Mayor of Letharnen as an appointee of the Duke of Haalkitaine. Would that be the Emperor? That's not listed as one of his - or anyone's - titles, and a city seems rather small to have a Duke.
It would make sense for Haalkitaine to be part of barony or county Haalkitaine, and that be one of the many titles contained in Jerrin's "etcetera," and perhaps that polity would be large enough to also contain Letharnen, with the mayors of both being appointed by Jerrin's Minister of Crown Estates.
(This may seem like I'm being picky, but I do alot of politicial intrigue in my campaigns, and someone may live or die based on these intracicies.)