Five years have passed, and Will has finally become a Ranger, with his own fief to look after. He soon learns that even sleepy little island fiefs have problems enough to keep him on his toes. Then he and his old friend Alyss are thrown into a terrifying new adventure, investigating the truth behind rumours of sorcery in a remote northern fief. As he stands in the forest, hearing eerie voices, with the horrific figure of the Night Warrior looming in the fog, Will must ask himself one question: is there a rational explanation . . . or does sorcery really exist? This is the fifth book in the enthralling Ranger's Apprentice series.