His Majesty's Dragon: A Novel of Temeraire
It's 1804, Napoleon is trying to invade England, and Dragons are real, intelligent enough to speak, and are used as sky ships manned with riflemen and flagmen.
A light, entertaining read, it's the first of at least nine books in the series
. The second one's on e-book from the library, so I guess I'm in for at least one more.