The Eternal Sea (Everlasting)

After the thrilling journey that led Camille through the dangerous discovery of love, secrets, and a magical stone that grants immortality, Camille has everything she wants. She's escaped the men who wanted her dead, and now she is ready to build a new life with Oscar, her one true love. But things are not to be so simple. Oscar is acting strangely, and before they can even board a ship from Australia back home, to San Francisco, Camille learns that the journey is not over. If she does not follow the magic of the curse of Umandu, her life and Ocar's could be in grave danger.