The City and the City is an application of Althusser on ideology. (If I'd been reading a different theorist at the time, I might have thought otherwise.) It's other things too, but they would involve spoilers.
Rosemary and Rue reminded me of a (much less compelling) Lackey elves-in-L.A. novel which started at a Renn Faire - the same origin story with which the Sasharia en Garde books are built on. (The recently-read Sasharia en Garde books are, sadly, my least-favorite Sherwood Smith books to date; what killed their momentum for me was that they are in two books. The first ends at an emotional pause, but with plot bleeding all over the place. I would have given up there had I not already bought the sequel.) Of course, R&R and the Lackey novel are all elves-in-CA novels, so of course they would speak to each other.
River of Gods (read thanks to coalescent's regular recent mentions) resonated with a minor, second-rate romance, Gambler's Woman, by Stephanie James, who can write much better work than this. (Give how old it is, I thought of it as juvenalia.) Both follow the plot, not the gaping wounds of half-seen story glimpsed along the way. Both have more sex scenes than I felt each needed, plot- or story-wise. Both featured major plot threads wound around inadequate communication. Both contrast luxury and artificial worlds with mundanity and "reality". Other than that, they have very little in common; but I keep thinking of them together.