The Underland Chronicles Book Four: Gregor and the Marks of Secret

In the fourth installment of the Underland Chronicles, Gregor and Queen Luxa investigate the mysterious disappearance of the mice, revealing a sinister truth that surpasses their expectations. As they uncover the true fate of the mice, Gregor's skills and destiny are pushed to their limits in this suspenseful and action-packed chapter leading toward the series' final prophecy.