The third volume about Captain Lawrence and Temeraire takes place after the successful resolution of the crisis with China. They are called suddenly away to deal with an international crisis - Great Britain has bought two dragon eggs from SItanbul, and they must be secured before they hatch in a few months time. The urgency necessitates an overland trip (for a nice change from the previous long sea voyages) which allow for plenty of adventurous encounters and local color.
I didn't feel this colume was as successfully plotted as the previous two - things seemed to resolve themselves mid-book, and the last third of the volume almost dragged, with nearly a completely different storyline. She did leave us with a kicker of a teaser for next time, though. Damn her. Hurry and write, Naomi Novik!