Black Powder War, the third book of Naomi Novik's
Temeraire series was released earlier this week. I will certainly be picking it up, as I thoroughly enjoyed the first book,
His Majesty's Dragon, and am impressed so far with the second,
Throne of Jade.
The books are fantasy/alternate-history set during the Napoleonic War. If you're familiar with Patrick O'Brian's
Aubrey/Maturin series, portions of which were adapted into the film
Master and Commander, the setting is essentially the same (and the writing style is similar, if not quite as good). England, with its powerful navy, is trying to prevent Napoleon from invading the British Isles. The addition in these books is that both sides have an aerial corps comprised of various breeds of intelligent dragons, each bonded with a captain and complete with a crew harnessed about them acting as riflemen, bombardiers, and lookouts. Very few of the dragon breeds have any sort of breath attack, so the aerial combat is very similar to ship-to-ship combat with the dragons making passes at one another with teeth and talons while their human crews are firing upon and perhaps even boarding the enemy dragon.
Without giving too much of the story away, the series focuses on a naval captain that bonds with a dragon born on his ship from an egg captured during an engagement with a French frigate. As the dragon bond is non-transferrable, the captain leaves the Navy for a life in the Aerial Corps. The dragon's breed is one relatively unknown in the West, and many hijinx

ensue. The focus is on the relationship formed between the dragon and his captain and life in the Aerial Corps, but there is a decent amount of action and intrigue as well.
These are Novik's first novels, though previously she worked as a writer (lead writer, I believe) on the
Shadows of Undrentide expansion for the D&D CRPG
Neverwinter Nights.