I don't really like the structuring of the recent trades. It seemed an odd decision to stick The Tsar's Daughter at the end of Beast of Rudhinstein, which saw the book end on a flat and rather weird note, when it would have been much more satisfying to have seen it end a story earlier, with the classic - 'How am I going to die?' 'Spectacularly.' 'Spectacularly? I can live with that.'
Tsar's Daughter could then have gone in at the start of the Amerika trade as a sort of prologue to the main tale, foreshadowing Jena's growing distrust of her father. Add Hero of the Revolution to the end, and (besides a really big book) you've had had the perfect note to end that trade on, rather than the fun but ultimately inconsequential Lulu's War.
As it is the tenth (and last?) trade is going to 'start', to all intents and purposes, with the 'end' of the rebellion plotline. All the flow of the earlier trades, where some clear attempt was being made to structure the books more thoughtfully, seems to have been lost.
Yeah, I know, I think far too much about this stuff.