Legends of the Brethren Court: Wild Waters

Publisher's Summary
An army of shadows has been amassed. Its one goal: to destroy the Pirate Lords for their Shadow Lord—an alchemist who has created a special gold, Shadow Gold that grants him unfathomable power. But the soothsayer, Tia Dalma has other plans for the Lords and cannot allow them to be destroyed. So she calls on the one man who can turn the tide—Captain Jack Sparrow.

Summary
Volume four finds Jack and his crew continuing their quest to search for the mysterious Shadow Gold, which leads them into a confrontation with King Samuel, Pirate Lord of the Ocean Atlantic Ocean, with the aid of their former shipmate Gombo, now the pirate captain Gentleman Jocard.