Rogues, Royals, and Raiding Roc. The Pirate Hunter Chronicles, #4

Two queens fighting for a throne. A king returns to his home. And the master of the seas. Three years, and Pirate Queen Bonnie Clearwater still sails the seas. She continues to evade the pirate hunters, and her army only grows stronger until it threatens the whole Alliance of Kingdoms. In a desperate move, Captain Adi sails to the east to look for allies before her cousin begins to march across the kingdoms, one by one. Meanwhile, Ravin must do the impossible-return to his home country of Arrothray and gain the leadership of the del Mankayl assassin clan.
After running from his past for years, the time has come to confront the truth behind his family name. The Red Wind Legends were once fire-side stories, told by sailors, parents, and travellers. But they continue to grow, wild and free, like the seas themselves. As the Alliance makes a final desperate stand against the Pirate Nation, the legacy of the Master of the Seas holds the key to victory.