From publisher blurb:
Waves of Scarlet
In the darkest depths of the ocean floor, off the Eastern coast of Ghelspad, lies the bound titan Kadum. He bleeds endlessly from the hole in his chest where his heart was plucked out. This blood — the blood of the Mountainshaker, the blood of the Father of Monsters — corrupts everything that it touches.
Welcome to the Blood Sea
This sourcebook contains information for campaigns set in and around the Blood Sea.
Guidelines for playing characters of each class as pirates or privateers are presented, including new class archetypes who draw power from the crimson depths. Pirate organizations are introduced for characters to join or oppose, and additional rules allow players to assume roles on a ship’s crew.