After their adventures in China in Throne of Jade, Temeraire, Laurence and the rest of the crew receive orders to travel to Istambul in the Ottoman Empire. Here, they must retrieve three Turkish dragon eggs for further transport to England. Pressed for time, Laurence opts for the overland route through Asia, a long and arduous journey. Needless to say, once in Istambul circumstances have changed. And that is just the beginning of the troubles for our heroes.
While still not quite reaching the level of the first book, Black Powder War is still eminently readable and fun. At this point it seems the macropolitical developments in Europe starts to diverge more markedly from our history, with Temeraire and Laurence acting as agents for a change in social status of dragons in the West.