The bone ship's wake - R. J. Barker

The sea dragons are returning, and Joron Twiner's dreams of freedom lie shattered. His Shipwife is gone and all he has left is revenge.

Leading the black fleet from the deck of Tide Child Joron takes every opportunity to strike at his enemies, but he knows his time is limited. His fleet is shrinking and the Keyshan's Rot is running through his body. He runs from a prophecy that says he and the avian sorcerer, the Windseer, will end the entire world.

But the sea dragons have begun to return, and if you can have one miracle, who is to say that there cannot be another?

'Excellent . . . one of the most interesting and original fantasy worlds I've seen in years'
Adrian Tchaikovsky