The hedgewitch of Foxhall

"Magic is fading from Wales -- choked off by King Offas Dyke, the enemy earthworks that spans the entire border. Even the dragons have disappeared. And now an attack is imminent. Prince Taliesin would love to watch magic die. Prince Dafydd fears it, and the throne. But when their father promises the crown to whichever son can destroy the dyke and restore magic to Wales, the brothers are forced into an uneasy rivalry. Ffion works hedgewitch magic...