Bone Ships by R.J. Barker, 496pp
For generations, the Hundred Isles have built their ships from the bones
of ancient dragons to fight an endless
war. The dragons disappeared, but the battles for supremacy persisted.
Now, the first dragon in centuries has been spotted in far-off waters, and both sides see a chance to shift the balance of power in their favor. Because whoever catches it will win not only glory but the war.