Eustace and his classmate Jill are called to Narnia on a quest to find the lost Prince Rilian, guided by the mysterious Marsh-wiggle Puddleglum and four signs given by Aslan, leading them through giants' lands and an underground kingdom ruled by an enchantress. A darker and more atmospheric entry in the series, with genuine tension and a memorable villain. Puddleglum is one of Lewis's most endearing characters.