I really enjoyed the first book in this series, "Dust." I very much liked the juxtaposition of the near-derelict generation ship with the mythology that has grown up around its technologies, and the complex, 'old-fashioned' court hierarchies of the society.
Unfortunately, I didn't feel that "Chill" lived up to the first book's promise. I just wasn't sucked back into the world. The plot kind of meandered, and while there were some interesting ideas and imagery, I didn't feel any tension or driving drama... it was a bit of a slog to get through it.