Ocean of Ink and Teeth

Cascadia Darnell is one of the most lethal predators of her oceanic species. Driven by the need to exact revenge on the kingdom that slayed her mother, she hunts the lone enemy ships that cross the treacherous Andronias Corridor by night, drowning the souls on board. A single moment of mercy and Cascadia is thrown into the heart of her enemies kingdom where she realizes there's much more than just her life she can lose.
The fate of two warring kingdoms balances precariously on the edge of a blade and she has the power to topple both. Where everyone else sees Cascadia as the monster she's sure she is, Josephi, the prince she unknowingly saved and should hate, seems to be around every corner intent on proving her wrong.