Above the Sea by Laura Burton

The little mermaid is engaged to the Prince… but she’s in love with Captain Hook.

When Lexa’s father, Poseidon, is taken by a powerful enemy, the only way to get him back is for the Princess of the Sea to accept a marriage alliance with the Prince of the Shores.
But her heart already belongs to Captain Hook, a broody pirate she saved from a shipwreck and nursed back to health at her island.
She longs to see him again.
What she doesn’t expect, however, is to find Hook at the castle ball, standing alongside the Prince.
Will Lexa follow through with the marriage alliance to save her father?
Or will she fight for her happy ending?