Los Ojos Del Dragón by Stephen King

In a kingdom ruled by a benevolent king, a sinister magician named Flagg orchestrates a devious plot to seize power by framing the king's son, Peter, for the monarch's murder. As Peter languishes in a high tower prison, he must rely on his wits, courage, and the loyalty of a few trusted allies to clear his name and reclaim his rightful place on the throne. This tale of intrigue, betrayal, and redemption unfolds in a richly imagined medieval world, where the battle between good and evil is fought not just with swords, but with cunning and determination.