After the English government is through using Temeraire and Laurence to drive Napolean back to France, they commute his death sentence to one of exile and send him to Australia, where absolutely nothing interesting proceeds to happen. 
 This is by far the weakest of the series, and by 100 pages in (of 270-something in my edition), I was tired of the petty almost-nothing happening. Petty politics, a new dragon who is not nearly as charming as Iskierka, and lots of speculation about smuggling. And lots of flying around. 
 I had to put it down for now because I was so disappointed after the last two books, which were much better paced and plotted, though I may pick it up again at some point if only to finish the rest of the series.