Gregor and the Marks of Secret

Gregor is drawn back into the Underland when its mice, known as nibblers, begin to disappear. Princess Luxa refuses to ignore the pattern and leads a mission to learn what is happening to them. Gregor joins her as the investigation reveals a threat more deliberate and destructive than either expected. The fate of the mice also points toward the last prophecy Gregor has not yet fulfilled, placing his role as a warrior under renewed pressure.