Having revisited this series, I remain delighted with it.
My only real critique is that this read very much like a middle-of-the-series book. But Isabella is wonderful and the subtle riffs on Darwin are fantastic. Everything that was good about the first two is here in abundance as well. On the other hand, I'm not sure how much newness there is. It does feel very similar in pacing and narrative to the previous one--which works on one hand, but it a bit frustrating on the other hand. I want more details! I want to know what's going to happen!