The Drachen's Iron Heart
Avalon is actually three nations, acting in concert: Avalon itself, Innismore, and the Highland Marches. Good Queen Elaine rules Avalon. James MacDuff leads the clans of the Highland Marches, and Innismore is ruled by Mad Jack O’Bannon. (The O’Bannon is apparently immortal: he shows up, rules the country for a while, and then takes a walk for a century or so before coming back and claiming his throne again. Look, seagulls!)
Avalon was ruled by Montaigne for several hundred years before emerging to claim their own place in history. 10 years ago, a young woman named Elaine returned from a mystical quest with an artifact known as the Graal, returned Glamour magic to Avalon and united the three kingdoms for the first time. In response, the king of Castille raised a mighty armada to invade Avalon and destroy Elaine. The armada was defeated off the coast of Avalon by a rag-tag fleet of privateers, the Sea Dogs, led by Jeremiah Berek.