Kingdom by the Sea — Anna Del C. Dye

A secret passageway conceals more than spider webs. The common belief in two kingdoms is that Serena, the Princess of Delmar, wants slaves. Even her fiancé loses his love for her, in commiseration with the islanders captured in her name. When she discovers his betrayal with Linah, a slave girl, it could be the end for Linah and all the slaves held prisoner in Delmar. A brokenhearted princess, now the queen, could become a weapon too powerful and deadly for her opponents to survive. And what will she do about the spies and political intrigue found in Delmar? Will this new queen use her powers to bring destruction to both kingdoms? To mend the rift between her and her fiancé? Or use it as a reason to become a true and kind monarch to her people?