Cipher of the Sunken Star

An agent of the Aethelgardian Kingdom, Kael Bosh, is tasked with seizing a world-altering artifact, the Cipher of Tides, from a sinking enemy warship. Dragged to the depths by its immense weight, he is saved by a mysterious siren who binds him to a new fate. Now, wielding a power he barely understands and haunted by a promise made to a creature of the abyss, Kael must not only win the war for his people but also unravel the secrets of the Cipher to save the world from a creeping darkness that poisons the very seas.