Notes

Summary: On the morning of her betrothal, Serafina's biggest worry should be about her reunion with Prince Mahdi, her childhood crush. Instead, she is haunted by strange dreams foretelling the return of an ancient evil. Then the city is stormed by assassins. Led only by her shadowy dreams and pursued by the invading army, Serafina and her best friend, Neela, embark upon a quest to find the army's leader and prevent a war between the mer nations. They must search for four other mermaid heroines who are scattered across the six seas. Together, they will form an unbreakable bond of sisterhood and uncover a conspiracy that will threaten their world's very existence. (Publisher)
Waterfire saga.