Daughter of the Pirate King by Tricia Levenseller

Seventeen-year-old Alosa, daughter of the infamous Pirate King, deliberately allows herself to be captured by enemy pirates aboard the ship Night Farer. Her mission is to retrieve a piece of a legendary treasure map hidden on the ship. However, her captor, the unexpectedly clever and attractive first mate Riden, poses a challenge to her plans. As Alosa navigates her captivity, she discovers that Riden is not just a mere obstacle but someone who might change her destiny.