The last third of this book was a wonderful return to form for the series. There are battles! Hard ethical choices! An intense focus on Laurence and Temeraire, rather than a cast of hundreds (which, given that characterization is one of Novik's weaknesses, I appreciate). I even love one of the new characters--the dragon general--and was sad when he was sidelined.
It's a good thing this section is what's freshest in my mind, because the first third, which focuses on the most pointless amnesia plot I've ever read, did not leave me in a three-star mood. But if you can persevere through it, there's some good stuff further along. I'm looking forward to seeing how the series wraps up in the next and final book.