The Wizard King — Paul R. Wonning

Under the vicious assault of Gwaum, the Kingdom of Sylvanhaven fell. The few that fled the catastrophe barely escaped with their lives. Tarque rescued Prince Bearl, heir to the kingdom, only to fall victim to pirates.
Tossed overboard in a small boat, Tarque despaired that the boy would suffer slavery as the powerful Sword of Vin fell into the hands of a red haired pirate. Using the magic power of the sword, the pirate Bort becomes the Pirate King of the Six Kingdoms. Only Bearl can destroy the Pirate King. But only if Tarque can find him and restore his legacy.