His Majesty's Dragon: Naomi Novik

Aerial combat brings a thrilling new dimension to the Napoleonic Wars as valiant warriors rise to Britain's defense by taking to the skies... not aboard aircraft but atop the mighty backs of fighting dragons.
When HMS Reliant captures a French frigate and seizes its precious cargo, an unhatched dragon egg, fate sweeps Capt. Will Laurence from his seafaring life into an uncertain future-and an unexpected kinship with a most extraordinary creature. Thrust into the rarified world of the Aerial Corps as master of the dragon Temeraire, he will face a crash course in the daring tactics of airborne battle. For as France's own dragon-borne forces rally to breach British soil in Bonaparte's boldest gambit, Laurence and Temeraire must soar into their own baptism of fire.