The Sunken City - Emma Noyes

Amare Bellamy is not a witch. Orphaned as a child and raised on a ship by the most dangerous men in the Caribbean, Amare is one thing and one thing alone: a pirate. And pirates hate magic. After a fateful storm plunges her to the depths of the ocean, Amare wakes to find herself in a strange new world: an underwater kingdom, where magic exists, but is strictly outlawed by the King—a man who claims to be her true father. As Amare struggles to fit into her new role as Princess of the Sunken City, she finds herself tangled in a web of love between two brothers—one good, one not so good. And as strange powers manifest within her, she must question everything she was raised to believe—especially if she has any hope of stopping the evil brewing at the bottom of the ocean.