Beneath the Haunting Sea by Joanna Ruth Meyer
Thanks to Page Street Kids for a copy of this Arc in exchange for a fair review. Talia is going to be having a her coming of age party in a few days, but she has been summoned to see the ailing Emperor. Talia has been shocked to find out that she is really the daughter of the Emperor and he has made her his heir. But the day of the party comes and the Emperor does not show and Talia has to make her own announcement when Eda walks into the party and tells everyone the Emperor is dead and she is the new Empress. Talia and her mother are arrested and then banished to the far end of the empire and never to return. Once aboard the ship her mother begins to act strangely. Then the first storm comes and her mother is hurt and falls sick. Talia fears that her mother has lost her mind when she begins raving about the sea goddess. When Talia arrives at the island she finds that it full of secrets and myths and full of sadness. She also finds out that she is to be married to the Baron...